Filed by Swift Transportation Co., Inc.
                                                     Commission File No. 0-18605

                       Pursuant to Rule 425 under the Securities Act of 1933 and
  deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934

                                            Subject Company: M.S. Carriers, Inc.
                                                     Commission File No. 0-14781

                                                            Date: April 18, 2001


Certain information in this filing consists of forward-looking statements within
the  meaning of the  Private  Securities  Litigation  Reform  Act of 1995.  With
respect to M.S. Carriers'  financial results these statements  include,  but are
not  limited to: M.S.  Carriers  will have  reasonable  success  recruiting  and
retaining  experienced  drivers and owner  operators  at the  company's  current
compensation  level;  demand and pricing for the markets served by M.S. Carriers
will remain at current  levels;  fuel will remain  available  and without  rapid
price  fluctuations;  and the  company's  accident  experience  will  remain  at
historical  levels.  Actual  results  may  differ  from  those  set forth in the
forward-looking statements. With respect to the proposed merger transaction with
Swift these risks and uncertainties  include: the ability to obtain governmental
approvals  of the merger on the  proposed  terms and  schedule;  the  failure of
Swift's and M.S. Carriers' stockholders to approve the merger; the risk that the
businesses will not be integrated  successfully or that  integration  costs will
exceed our  estimates;  the risk that the revenue and other  synergies  and cost
savings from the merger may not be fully  realized or may take longer to realize
than expected;  fluctuating stock market levels; the difficulty the stock market
may have in valuing the business model of the combined  company;  and disruption
from  the  merger  making  it more  difficult  to  maintain  relationships  with
customers, employees or suppliers.

A discussion of these and other factors that could cause M.S.  Carriers  results
to differ materially from those described in the forward-looking  statements can
be found in the most recent Annual Report on Forms 10-K of M.S. Carriers,  filed
with the Securities and Exchange  Commission and available at the Securities and
Exchange  Commission's internet site  (http://www.sec.gov).  Swift undertakes no
obligation to publicly update or revise any forward-looking statements,  whether
as a result of new information,  future events, or otherwise.  Further,  nothing
herein shall  constitute  adoption or approval of any analyst  report  regarding
Swift,  nor any undertaking to update or comment upon analysts'  expectations in
the future.

The  proposed  merger  transaction  between  Swift  and  M.S.  Carriers  will be
submitted to the companies'  stockholders  for their  consideration.  Swift will
file a  registration  statement  on Form S-4 that  will  include  a joint  proxy
statement/prospectus.    Stockholders    should    read    the    joint    proxy
statement/prospectus  regarding the proposed transaction that will be filed with
the SEC and mailed to stockholders.  The joint proxy  statement/prospectus  will
contain important  information that stockholders  should consider.  Stockholders
will be able to obtain a free copy of the joint proxy  statement/prospectus,  as
well as other  filings  containing  information  about Swift and M.S.  Carriers,
without charge, at the SEC's internet site  (http://www.sec.gov).  Copies of the
joint proxy  statement/prospectus  and the SEC filings that will be incorporated
by  reference  in the joint  proxy  statement/prospectus  can also be  obtained,
without charge, by directing a request to: Swift  Transportation Co., Inc., 2200
South  75th  Avenue,  Phoenix,  AZ 85043,  Attention:  Chief  Financial  Officer
(602-269-9700).  Swift and M.S.  Carriers and certain  other persons named below



may be deemed to be participants  in the  solicitation of proxies of Swift's and
M.S. Carriers' stockholders to approve the transaction. The participants in this
solicitation may include the directors and executive  officers of Swift and M.S.
Carriers.  A detailed list of the names and  interests of Swift's  directors and
officers is contained in Swift's proxy  statement  for its 2000 annual  meeting,
and a detailed list of the names and interests of M.S.  Carriers'  directors and
officers is  contained in M.S.  Carriers'  proxy  statement  for its 2000 annual
meeting.

As of the  date  of  this  communication,  none  of the  foregoing  participants
individually beneficially owns in excess of 5% of Swift's common stock, or 5% of
M.S. Carriers' common stock,  except that Jerry Moyes, CEO of Swift beneficially
owns more than 5% of the common  stock of Swift and Michael S.  Starnes,  CEO of
M.S.  Carriers,  beneficially  owns  more  than 5% of the  common  stock of M.S.
Carriers.  Certain  employees  of M.S.  Carriers,  including  participants,  may
receive accelerated vesting of their stock options in connection with the merger
in accordance with their existing stock option agreements. In addition,  certain
officers of M.S.  Carriers,  as a condition  to the closing of the merger,  will
enter into employment  agreements that will become  effective upon completion of
the merger. A description of the employment  agreements will be contained in the
joint proxy statement/prospectus.

The  communication  filed  herewith is a press release of M.S.  Carriers  issued
April 17, 2001.




FINAL FOR RELEASE


M.S. Carriers, Inc. Reports Increase In Revenue In First Quarter 2001

Contact: Joe Barrow  (901) 344-4401

Memphis,  Tenn.  (April 17, 2001) -- M.S.  Carriers,  Inc.  (NASDAQ:  MSCA),  an
irregular route truckload carrier, reports the following results for the quarter
ending March 31, 2001:

                                         Three Months Ended March 31

                                          2001         2000   % Change

Revenues                               $  182.2     $  167.1     9.0%

Operating Income                       $   6.7      $    9.9   -31.8%

Net Income                             $   1.1      $    4.6   -77.0%

Diluted Earnings Per Share             $   0.09     $    0.38  -76.3%

                                      (In millions except per share data)

Operating  revenues  for the first  quarter of 2001  increased  nine  percent to
$182.2 million from $167.1 million in the same period 2000. Operating income for
the first  quarter of 2001 was $6.7 million,  a 31.8 percent  decrease from $9.9
million in the same period  2000.  Net income for the quarter  ending  March 31,
2001 was $1.1  million,  a 77.0 percent  decrease from $4.6 million in the first
quarter of 2000.  Diluted  earnings per share for the first quarter of 2001 were
nine cents,  a decrease of 76.3  percent from 38 cents for the same quarter last
year.

Mike  Starnes,  chairman  and chief  executive  officer  said:  "Softness in the
truckload freight markets during the first quarter of 2001 lowered our operating
margins primarily through a greater  percentage of non-revenue miles. The months
of January and February 2001 were particularly  affected by this factor.  Market
conditions improved in March but were still down compared to last year.

"We are progressing with the merger with Swift Transportation that was announced
December 11, 2000.  During this quarter,  M.S.  Carriers accrued $0.02 per share
for merger related expenses. We expect to close the merger in the second quarter
of 2001."

M.S.  Carriers  will hold a  conference  call on April 18, 2001 at 9:00a.m.  CDT
regarding the first quarter earnings. The call may be accessed at (888) 423-3275
in the United States or (612) 332-0418 Internationally. The conference call will
be  available  for replay from 12:30 p.m.  CDT,  April 18, 2001 until 12:00 p.m.
CDT,  April 25, 2001 at (800)  475-6701 in the United States and (320)  365-3844
Internationally using access code 582787.

This  press  release  contains  certain  forward-looking  statements  within the
meaning  of  the  Private  Securities   Litigation  Reform  Act  of  1995.  This
information  is in accordance  with the company's  current  expectations  and is
subject to certain risks and  uncertainties  that could cause actual  results to
differ materially from those set forth in the forward-looking  statements.  With
respect to M.S. Carriers'  financial results these statements  include,  but are
not  limited to: M.S.  Carriers  will have  reasonable  success  recruiting  and
retaining  experienced  drivers and owner  operators  at the  company's  current
compensation  level;  demand and pricing for the markets served by M.S. Carriers
will remain at current  levels;  fuel will remain  available  and without  rapid
price  fluctuations;  and the  company's  accident  experience  will  remain  at
historical  levels.  With respect to the proposed merger  transaction with Swift
these uncertainties include, without limitation, the following: the inability to
obtain governmental  approvals of the merger on the proposed terms and schedule;
the failure of M.S. Carriers and Swift  stockholders to approve the merger;  the
risk that the businesses will not be integrated successfully;  the risk that the
revenue synergies and costs savings anticipated from the merger may not be fully
realized or may take longer to realize than expected;  the risk that  additional
insurance and claims reserves and expenses may be incurred; disruptions from the
merger  making it more  difficult  to  maintain  relationships  with  customers,
employees or suppliers;  and increased  competition  and its effects on pricing,
spending,  third-party relationships and revenues. Additional factors that could
cause results to differ  materially from those described in the  forward-looking
statements can be found in the 2000 Annual Report on Form 10-K of M.S.  Carriers
with the Securities Exchange Commission.







                                 M.S. CARRIERS, INC. AND SUBSIDIARIES
                                      CONSOLIDATED BALANCE SHEETS
                                                                            31-Mar-01         31-Dec-00
                                                                                      
ASSETS
CURRENT ASSETS:
  CASH & CASH EQUIV.                                                      $   287,532       $   442,188
  ACCTS RECEIVABLE:
   TRADE, NET                                                              83,785,713        84,547,281
   AFFILIATE                                                                                 11,007,081
   OFFICERS & EMPLOYEES                                                     1,718,019         1,657,217
                                                                        -------------     -------------
                                                                           85,503,732        97,211,579

  RECOVERABLE INCOME TAXES                                                  5,991,776         3,080,972
  DEFERRED INCOME TAXES                                                    14,078,000        14,113,152
  PREPAID EXPENSES & OTHER                                                 13,800,525         8,590,836
                                                                       --------------     -------------
TOTAL CURRENT ASSETS                                                      119,661,565       123,438,727

PROPERTY & EQUIPMENT
  LAND & LAND IMPROVEMENTS                                                 13,491,942        13,469,040
  BUILDINGS                                                                40,016,991        39,987,066
  REVENUE EQUIPMENT                                                       566,742,379       567,967,605
  SERVICE EQUIPMENT & OTHER                                                56,522,084        56,118,261
  CONSTRUCTION IN PROGRESS                                                  2,976,729         2,895,443
                                                                       --------------    --------------
                                                                          679,750,125       680,437,415

  LESS ACCUMULATED DEPR & AMORTIZATION                                    218,730,253       204,637,683
                                                                       --------------    --------------
                                                                          461,019,872       475,799,732

OTHER ASSETS                                                               20,961,393        21,213,310
                                                                       --------------    --------------
TOTAL ASSETS                                                            $ 601,642,830     $ 620,451,769
                                                                       ==============     =============

LIABILITIES & STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
 ACCOUNTS PAYABLE:
  TRADE, NET                                                            $   5,298,319      $  7,398,017
  AFFILIATE                                                                   953,385
 ACCRUED COMPENSATION AND RELATED COSTS                                     7,395,997         4,611,314
 ACCRUED EXPENSES                                                          15,465,644        13,139,878
 CLAIMS PAYABLE                                                            33,752,269        33,842,957
 CURR. MATURITIES OF L.T. DEBT                                             61,171,858        65,558,795
                                                                        -------------     -------------
      TOTAL CURRENT LIABILITIES                                           124,037,472       124,550,961

FAIR MARKET VALUE OF INTEREST RATE SWAPS                                    3,039,900
LONG-TERM DEBT, LESS CURRENT MATURITIES                                   186,743,933       207,816,118
DEFERRED INCOME TAXES                                                      70,258,516        69,929,823

STOCKHOLDERS' EQUITY:
  COMMON STOCK                                                                112,341           111,685
  ADD. PAID IN CAPITAL                                                     61,868,748        60,567,768
  RETAINED EARNINGS                                                       161,384,911       160,321,332
  NOTES RECEIVABLE FROM OFFICERS                                             (851,719)         (851,719)
  CUMULATIVE OTHER COMPREHENSIVE LOSS                                      (4,951,272)       (1,994,199)
                                                                       --------------     -------------
       TOTAL STOCKHOLDERS' EQUITY                                         217,563,009       218,154,867
                                                                       --------------     -------------
TOTAL LIABILITIES &  STOCKHOLDERS' EQUITY                               $ 601,642,830     $ 620,451,769
                                                                       ==============     =============











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                                               M.S. CARRIERS, INC. AND SUBSIDIARIES
                                                       STATEMENTS OF INCOME
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                                                                        Three Months Ended
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                                                                              31-Mar
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                                                         2001                           2000
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                                                                     Percent of                    Percent of
                                                                      Revenue                       Revenue
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Operating Revenues                                     $182,183,334                  $167,068,901
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Operating Expenses:
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  Salaries, wages and benefits                           66,182,115       36.33%       53,042,521       31.75%
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  Operations and maintenance                             38,481,921       21.12%       31,511,492       18.86%
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  Taxes and licenses                                      3,890,545        2.14%        3,225,958        1.93%
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  Insurance and claims                                    8,294,694        4.55%        4,991,473        2.99%
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  Communications and utilities                            2,496,661        1.37%        2,071,188        1.24%
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  Depreciation and amortization                          16,539,574        9.08%       18,208,486       10.90%
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- -----------------------------------------------------------------------------------------------------------------------------------
  Gain on disposal of revenue equipment                    -139,340       -0.08%          -12,934       -0.01%
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  Rent and purchased transportation                      37,440,981       20.55%       42,917,026       25.69%
- -----------------------------------------------------------------------------------------------------------------------------------
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  Other                                                   2,269,418        1.25%        1,247,191        0.75%
                                                          ---------        -----        ---------        -----
- -----------------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------------
Total Operating Expenses                                175,456,569       96.31%      157,202,401       94.09%
                                                        -----------       ------      -----------       ------
- -----------------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------------
Operating Income                                          6,726,765        3.69%        9,866,500        5.91%
- -----------------------------------------------------------------------------------------------------------------------------------
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Other Expense (income):
- -----------------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------------
  Interest Expense                                        4,740,860        2.60%        3,424,101        2.05%
- -----------------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------------
  Other                                                     194,637        0.11%         -630,361       -0.38%
                                                            -------        -----         --------       ------
- -----------------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------------
                                                          4,935,497        2.71%        2,793,740        1.67%
                                                          ---------        -----        ---------        -----
- -----------------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------------
Income before income taxes                                1,791,268        0.98%        7,072,760        4.23%
- -----------------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------------
Income taxes                                                727,689        0.40%        2,458,472        1.47%
                                                            -------        -----        ---------        -----
- -----------------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------------
Net income                                               $1,063,579        0.58%       $4,614,288        2.76%
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Diluted Earnings per share                                    $0.09                         $0.38
- -----------------------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------------------
Common Shares & Common Share Equivalents                 11,732,694                    12,189,276
- -----------------------------------------------------------------------------------------------------------------------------------
Note: Due to the  requirements  of FAB 101, for 2001 fuel  surcharges  are now classified as revenue  instead of offsetting fuel
expense in operations  and  maintenance.  For  comparability,  the statement of income for 2000 has been modified to reflect this
change.








                                        M.S. CARRIERS, INC. AND SUBSIDIARIES
                                                OPERATING STATISTICS

                                     ---------------------------------------
                                               Three Months Ended
                                                     31-Mar
                                           2001                      2000
                                           ----                      ----

Total Miles                              140,082,130            123,738,440

Empty Miles                               21,267,241             16,645,696

Empty Mile %                                  15.18%                 13.45%

Trucking Revenue                        $174,019,380           $150,652,616

Revenue per Mile                               1.242                  1.218

Revenue per Loaded Mile                        1.465                  1.407

Ending Company Tractors                        3,704                  3,430

Ending Leased Owner Operators                    689                    602

Ending Owner Operators                           614                    685
                                       -------------            -----------
Ending Tractors                                5,007                  4,717

Beginning Company Tractors                     3,733                  3,283

Beginning Leased Owner Operators                 718                    562

Beginning Owner Operators                        678                    743
                                       -------------            -----------
Beginning Tractors                             5,129                  4,588

Utilization                                    2,169                  2,042

Revenue per Tractor per Week              $    2,695             $    2,486














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                                                      M.S. CARRIERS, INC. AND SUBSIDIARIES
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                                                           Product Revenue Statistics
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                                                                 Three Months Ended
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                                                                        31-Mar
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                                                                                Percent of
                                                    2001            2000          Change
                                                    ----            ----        ----------
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Domestic Irregular Route Trucking                $104,780          $92,373         13%

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International Irregular Route Trucking             35,570           33,887          5%
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Dedicated Route Trucking                           33,669           24,393         38%
                                             ------------     ------------
Trucking Revenue                                  174,019          150,653         16%

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Logistics Revenue                                   -               17,261       -100%

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Inter Divisional Elimination and Other (1)          8,164            (845)        N/A
                                               ------------    ------------

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Total Revenue                                   $   182,183    $  167,069          9%
                                               ============    ===========
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Trucking Operating Ratio                           96.3%            93.9%      -2.4 points
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Logistics Operating Ratio                           N/A             96.1%          N/A
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- ------------------------------------------------------------------------------------------------------------------------------------

Total Company Operating Ratio                      96.3%            94.1%      -2.2 points
- ------------------------------------------------------------------------------------------------------------------------------------
(1)  For 2001, this includes revenues from the lease purchase program and fuel surcharges. For 2000, this includes intercompany
     elimination for logistics revenue and fuel surcharges.



This press  release is being  filed with the SEC  pursuant to Rule 425 under the
Securities Act of 1933.