Exhibit 10.3


                                                                  EXECUTION COPY

                        PARTICIPATION RIGHTS AGREEMENT


              PARTICIPATION RIGHTS AGREEMENT, dated as of October 19, 1999, by
and among MIDDLE BAY OIL COMPANY, INC., an Alabama corporation (the "COMPANY"),
THE PRUDENTIAL INSURANCE COMPANY OF AMERICA (the "PURCHASER") and 3TEC ENERGY
COMPANY, L.L.C. , a Delaware limited liability company (the "STOCKHOLDER"),
which as of the date hereof is the holder of approximately 35.5% of the issued
and outstanding shares of the Company's common stock, par value $0.02 per share
("COMMON STOCK"), Common Stock purchase warrants ("WARRANTS") entitling the
Stockholder to purchase 3,600,000 additional shares of Common Stock (subject to
adjustment as provided therein) and one or more Senior Subordinate Promissory
Notes ("NOTES") in the aggregate principal amount of $10,700,000 convertible at
the election of the Stockholder into 3,566,666 additional shares of Common Stock
(subject to adjustment as provided therein).

       1.     BACKGROUND.  The Company and the Purchaser have entered into a
Securities Purchase Agreement (the "PURCHASE AGREEMENT"), dated as of the date
hereof, pursuant to which the Company has agreed, among other things, to issue
and sell (a) 1,055,042 shares of Common Stock, (b) Common Stock purchase
warrants ("PRUDENTIAL WARRANTS") entitling Purchaser to purchase 798,677
additional shares of Common Stock (subject to adjustment as provided therein),
and (c) $2,373,844 aggregate principal amount of Notes convertible at the
election of the Purchaser into 791,281 additional shares of Common Stock
(subject to adjustment as provided therein).   This Agreement shall become
effective upon the issuance of the Securities.

       2.     TRANSFERS OF COMMON STOCK.

              2.1    RIGHTS OF PARTICIPATION.

                     (a)    TAGALONG OFFER.  If the Stockholder or an Affiliate
       thereof proposes to sell for value Notes or shares of the Common Stock or
       Common Stock Equivalents (each of the Stockholder and any Affiliate
       thereof being referred to herein as a "TRANSFEROR"), BUT EXCLUDING (i) a
       sale which is pursuant to a public offering registered under the
       Securities Act or is a transfer pursuant to Rule 144 of the Securities
       Act, (ii) a sale to one or more of its Affiliates by a Transferor, or
       (iii) a sale or sales which are effected by such Transferor in a single
       transaction or a series of transactions and which do not involve more
       than 5% of the Fully Diluted Common Stock, then such Transferor shall
       offer (the "PARTICIPATION OFFER") to include in the proposed sale a
       number of shares of Common Stock or Common Stock Equivalents, or an
       aggregate principal amount of Notes, as the case may be, designated by
       any



       Tagalong Holder, not to exceed, in respect of any such Tagalong
       Holder, the number of shares of Common Stock or Common Stock
       Equivalents, or the aggregate principal amount of Notes, as the case
       may be, equal to the product of (a) the aggregate principal amount of
       Notes, or the aggregate number of shares of Common Stock or Common
       Stock Equivalents, as the case may be, to be sold by the Transferor
       to the proposed transferee and (b) a fraction, the numerator of which
       shall be the number of shares of Fully Diluted Common Stock held by
       such Tagalong Holder and the denominator of which shall be the number
       of shares of Fully Diluted Common Stock held by the Transferor and
       the Tagalong Holders.  The Transferor shall give written notice to
       each Tagalong Holder of the Participation Offer (the "PARTICIPATION
       OFFER NOTICE") at least 30 days prior to the proposed sale.  The
       Participation Offer Notice shall specify the proposed transferee, the
       aggregate principal amount of Notes, or  the number of shares of
       Common Stock or Common Stock Equivalents, as the case may be, to be
       sold to such transferee, the amount and type of consideration to be
       received therefor, and the place and date on which the sale is to be
       consummated.

                     (b)    EXERCISE.  Each Tagalong Holder who wishes to
       include Notes or shares of Common Stock or Common Stock Equivalents in
       the proposed sale in accordance with this Section 2.1 shall so notify the
       Transferor not more than 15 days after the date of receipt of the
       Participation Offer Notice.  The Participation Offer shall be conditioned
       upon the Transferor's sale of Notes or shares of Common Stock or Common
       Stock Equivalents pursuant to the transactions contemplated in the
       Participation Offer Notice with the transferee named therein.  If any
       Tagalong Holders have accepted the Participation Offer, the Transferor
       shall reduce to the extent necessary the aggregate principal amount of
       Notes, or the number of shares of Common Stock or Common Stock
       Equivalents, as the case may be, it otherwise would have sold in the
       proposed sale so as to permit such Tagalong Holders to sell the aggregate
       principal amount of Notes, or the number of shares of Common Stock or
       Common Stock Equivalents, as the case may be, that they are entitled to
       sell under this Section 2.1, and the Transferor and such Tagalong Holders
       shall sell the aggregate principal amount of Notes, or the number of
       shares of Common Stock or Common Stock Equivalents, as the case may be,
       specified in the Participation Offer to the proposed transferee in
       accordance with the terms of such sale set forth in the Participation
       Offer Notice.  If no Tagalong Holder accepts the Participation Offer in
       accordance with this Section 2.1(b), the Transferor shall be free to
       consummate the proposed sale that is the subject of such Participation
       Offer with the proposed transferee.  Any Notes or shares of the Common
       Stock or Common Stock Equivalents sold or otherwise transferred in
       compliance with the terms of this Agreement shall not thereafter be
       subject to the terms of this Agreement.



              2.2    RESTRICTIVE LEGEND.  Contemporaneously with the execution
and delivery of this Agreement, (i) each certificate representing shares of
presently outstanding, or contemporaneously issued,  Common Stock, (ii) each
certificate representing Warrants presently outstanding or contemporaneously
issued and (iii) each Note presently outstanding or contemporaneously issued,
held by the Stockholder shall be stamped or otherwise imprinted with a
conspicuous legend (or shall be exchanged for stock certificates, Warrant
certificates or Notes bearing a legend) in substantially the following
respective forms:

       "THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN
       RESTRICTIONS SET FORTH IN A PARTICIPATION RIGHTS AGREEMENT DATED
       AS OF OCTOBER 19, 1999 AMONG THE CORPORATION, THE PRUDENTIAL
       INSURANCE COMPANY OF AMERICA AND 3TEC ENERGY COMPANY, L.L.C., AND
       SUCH SHARES MAY NOT BE TRANSFERRED EXCEPT IN COMPLIANCE WITH SUCH
       RESTRICTIONS.  SUCH PARTICIPATION RIGHTS AGREEMENT IS ON FILE AT
       THE OFFICE OF THE CORPORATION AND A COPY THEREOF WILL BE FURNISHED
       WITHOUT CHARGE TO THE HOLDER OF THE SHARES REPRESENTED BY THIS
       CERTIFICATE UPON WRITTEN REQUEST." [FOR COMMON STOCK]

       "THE COMMON STOCK PURCHASE WARRANTS REPRESENTED BY THIS
       CERTIFICATE, AND THE SHARES OF COMMON STOCK ISSUABLE UPON THE
       EXERCISE OF SUCH WARRANTS, ARE SUBJECT TO CERTAIN RESTRICTIONS SET
       FORTH IN A PARTICIPATION RIGHTS AGREEMENT DATED AS OF OCTOBER 19,
       1999 AMONG THE CORPORATION, THE PRUDENTIAL INSURANCE COMPANY OF
       AMERICAN AND 3TEC ENERGY COMPANY, L.L.C., AND SUCH COMMON STOCK
       PURCHASE WARRANTS AND SHARES OF COMMON STOCK MAY NOT BE
       TRANSFERRED EXCEPT IN COMPLIANCE WITH SUCH RESTRICTIONS.  SUCH
       PARTICIPATION RIGHTS AGREEMENT IS ON FILE AT THE OFFICE OF THE
       CORPORATION AND A COPY THEREOF WILL BE FURNISHED WITHOUT CHARGE TO
       THE HOLDER OF THE COMMON STOCK PURCHASE WARRANTS REPRESENTED
       HEREBY, OR TO THE HOLDER OF ANY SHARES OF COMMON STOCK ISSUABLE
       UPON THE EXERCISE OF SUCH WARRANTS, UPON WRITTEN REQUEST."  [FOR
       WARRANTS]

       "THIS NOTE, AND THE SHARES OF COMMON STOCK OF THE CORPORATION
       ISSUABLE UPON THE CONVERSION HEREOF, ARE SUBJECT TO CERTAIN
       RESTRICTIONS SET FORTH IN A PARTICIPATION RIGHTS AGREEMENT DATED
       AS OF OCTOBER 19, 1999 AMONG THE CORPORATION, THE PRUDENTIAL
       INSURANCE COMPANY OF AMERICA AND 3TEC ENERGY COMPANY, L.L.C., AND
       THIS NOTE AND SUCH SHARES OF COMMON STOCK MAY NOT BE TRANSFERRED
       EXCEPT IN COMPLIANCE WITH SUCH RESTRICTIONS.  SUCH PARTICIPATION
       RIGHTS AGREEMENT IS ON FILE AT THE OFFICE OF THE CORPORATION AND A
       COPY THEREOF WILL BE FURNISHED WITHOUT CHARGE



       TO THE HOLDER THIS NOTE, OR TO THE HOLDER OF SUCH SHARES OF COMMON
       STOCK, UPON WRITTEN REQUEST."  [FOR NOTES]

Each certificate issued upon the direct or indirect transfer (other than
transfers made in compliance with the terms of this Agreement) of any such
outstanding Common Stock or Warrants, and each Note issued upon the direct or
indirect transfer (other than transfers made in compliance with the terms of
this Agreement) of any other Note, held by the Stockholder, and each certificate
representing shares of Common Stock issuable upon exercise of any such Warrant
or upon conversion of any such Note, as the case may be, (other than upon
exercise of any Warrant or  conversion of any Note transferred in compliance
with the terms of this Agreement) shall also be stamped or otherwise imprinted
with the applicable, foregoing legend.

              2.3    EFFECT OF VIOLATION.  Any purported transfer of Notes,
Common Stock or Common Stock Equivalents which is not permitted by this
Agreement or which is in violation of this Agreement shall be void and of no
force and effect whatsoever.

       3.     DEFINITIONS.   As used herein, unless the context otherwise
requires, the following terms have the following respective meanings:

              AFFILIATE: With respect to any Person, any other Person who,
       directly or indirectly, is in control of, is controlled by, or is under
       common control with, such Person.  As used herein, the term "CONTROL"
       means possession, directly or indirectly, of the power to direct or cause
       the direction of the management or policies of a Person, whether through
       the ownership of voting securities, by contract or otherwise.

              AGREEMENT:  This Participation Rights Agreement, as the same may
       be amended from time to time.

              COMMON STOCK:  As defined in the introductory paragraph of this
Agreement.

              COMMON STOCK EQUIVALENTS:   All options, rights or warrants
       (including, without limitation, the Warrants) to purchase shares of
       Common Stock, all securities convertible into or exchangeable for shares
       of  Common Stock (including, without limitation, the Notes), all shares
       of Common Stock into which shares of common stock of another class have
       been converted, and all shares of stock or other securities of the
       Company into which Common Stock (or Common Stock Equivalents) have been
       converted.

              COMPANY:  As defined in the introductory paragraph of this
              Agreement.

              FULLY DILUTED COMMON STOCK:   At any time, the then outstanding



       Common Stock plus (without duplication) all shares of Common Stock
       issuable, whether at such time or upon the passage of time or the
       occurrence of future events, upon the exercise, conversion or exchange of
       all then outstanding options, rights or warrants (including, without
       limitation, the Warrants) or securities convertible into or exchangeable
       for Common Stock (including, without limitation, the Notes).

              PARTICIPATION OFFER:   As defined in Section 2.1(a).

              PARTICIPATION OFFER NOTICE:   As defined in Section 2.1(a).

              PERSON:  A corporation, an association, a partnership, a limited
       liability company, a business, an individual, a governmental or political
       subdivision thereof or a governmental agency.

              PURCHASE AGREEMENT:   As defined in Section 1.

              PURCHASER:   As defined in the introductory paragraph of this
       Agreement.

              REQUIRED HOLDERS:  At any time, any holder or holders of 662/3% of
       the aggregate number of (i) shares of Common Stock held by all Tagalong
       Holders,  (ii) shares of Common Stock issuable upon  the exercise of all
       Warrants held by all Tagalong Holders and (iii) shares of Common Stock
       issuable upon the conversion of all Notes held by all Tagalong Holders.

              SECURITIES ACT:   The Securities Act of 1933, as amended, or any
       successor statute thereto.

              STOCKHOLDER:   As defined in the introductory paragraph of this
       Agreement.

              TAGALONG HOLDER.  Any holder of (i) Common Stock, Warrants or
       Notes issued pursuant to the Purchase Agreement, or (ii) Common Stock
       issued upon the exercise of such Warrants or the conversion of such
       Notes.

              TRANSFEROR:   As defined in Section 2.1(a).

              WARRANTS:   As defined in Section 1.

       4.     AGREEMENT.  A copy of this Agreement shall be filed with the
permanent records of the Company and shall be kept at all times at the principal
place of business of the Company.

       5.     FURTHER ASSURANCES.   Each party agrees to do, or cause to be
done, such further acts and to execute and deliver, or to cause to be executed
and delivered, such further agreements, instruments, certificates and other
documents as may be necessary or appropriate to effectuate and carry out the
purposes of this Agreement.



       6.     AMENDMENTS AND WAIVERS.  This Agreement may be amended, modified
or supplemented only by an instrument approved in writing by the Company, the
Stockholders and the Required Holders.  Any agreement of a party hereto to waive
compliance with the performance of any agreement or condition herein shall be
valid only if set forth in an instrument in writing signed by such party.

       7.     NOTICES.  All communications provided for hereunder shall be sent
by first-class mail and (a) if addressed to a Tagalong Holder, addressed to such
Tagalong Holder in the manner set forth in the Purchase Agreement, or at such
other address as such Tagalong Holder shall have furnished to the other parties
hereto in writing, (b) if addressed to the Company, at 1221 Lamar Street, Suite
1020, Houston, Texas 77010, Attention: Floyd C. Wilson, or at such other
address, or to the attention of such other officer, as the Company shall have
furnished to the other parties hereto in writing; PROVIDED, HOWEVER, that any
such communication to the Company may also, at the option of any of the other
parties hereto, be either delivered to the Company at its address set forth
above or to any officer of the Company, or (c) if to the Stockholder or any
other Transferor, at 3TEC Energy Company, L.L.C., 5910 N. Central Expressway,
Suite 1150, Dallas, TX 75206, Attention:  Floyd C. Wilson, or at such other
address as such party shall have furnished to the other parties hereto in
writing.

       8.     ASSIGNMENT.  This Agreement shall be binding upon and inure to the
benefit of and be enforceable by the parties hereto and their respective
successors and assigns (including, in the case of the Stockholder, the other
Transferors) other than (a) the Persons to which a sale or other transfer is
made pursuant to clauses (i) and (iii) of Section 2.1(a) or their respective
successors and assigns (except the Stockholder) and (b) any transferee to which
a sale or other transfer is made by the Transferor in compliance with Section
2.1.  In the event that the Stockholder transfers any  Notes, Warrants, Common
Stock or Common Stock Equivalents to any of its Affiliates other than the
Company, it shall cause such Affiliates to comply with the provisions of this
Agreement.  In addition, and whether or not any express assignment shall have
been made, the provisions of this Agreement which are for the benefit of the
Purchaser shall also be for the benefit of and enforceable by any subsequent
Tagalong Holder.

       9.     DESCRIPTIVE HEADINGS.  The descriptive headings of the several
sections and paragraphs of this Agreement are inserted for reference only and
shall not limit or otherwise affect the meaning hereof.

       10.    SPECIFIC PERFORMANCE.  The parties hereto recognize and agree that
money damages may be insufficient to compensate the Tagalong Holders for
breaches by the Company or the Stockholder of the terms hereof and,
consequently, that the equitable remedy of specific performance of the terms
hereof will be available in the event of any such breach.

       11.    GOVERNING LAW.  This Agreement shall be construed and enforced in
accordance with, and the rights of the parties shall be governed by, the laws of
the State of Texas.



       12.    COUNTERPARTS.  This Agreement may be executed simultaneously in
any number of counterparts, each of which shall be deemed an original, but all
such counterparts shall together constitute one and the same instrument.




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              IN WITNESS WHEREOF, the parties have executed this Agreement, or
caused this Agreement to be executed and delivered by their respective officers
thereunto duly authorized, as of the date first above written.


                                          MIDDLE BAY OIL COMPANY, INC.



                                          By:    /s/ Floyd C. Wilson
                                                 -------------------
                                          Name:  Floyd C.  Wilson
                                          Title: President and Chief Executive
                                          Officer


                                          THE PRUDENTIAL INSURANCE
                                          COMPANY OF AMERICA



                                          By:    /s/ Ric E. Abel
                                          Name:  Ric E. Abel
                                          Title: Vice President


                                          3TEC ENERGY COMPANY, L.L.C.



                                          By:    /s/ Floyd C. Wilson
                                                 -------------------
                                          Name:  Floyd C. Wilson
                                          Title: Managing Director