Eagle Rock Energy Partners L P (EROC) DEFA14A Additional proxy soliciting materials

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.     )
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o	Soliciting Material Pursuant to §240.14a-12
Eagle Rock Energy Partners, L.P.
(Name of Registrant as Specified In Its Charter)
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)
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May 25, 2011

Dear Fellow Limited Partner,

By now, you should have received your annual report, proxy statement and voting card for Eagle Rock Energy Partners, L.P.’s 2011 Annual Meeting of Limited Partners, to be held on June 7, 2011.  According to our records, your units have not yet been voted.

Your Board of Directors recommends the following votes for each of the respectively numbered proposals outlined in the proxy statement:

1.A vote “FOR” the Election of the Class I Elected Director Nominee;

2.A vote “FOR” the Advisory Vote on Executive Compensation; and

3.A vote for “1 YEAR” on the Advisory Vote on the Frequency of Holding an Advisory Vote on Executive Compensation.

Please vote today!

Your vote is extremely important to us.  The fastest way to vote is by telephone or internet.  Instructions on how to vote your units are enclosed.

We have recently retained Morrow & Co., LLC* to assist us in soliciting your vote.  If you have any questions or need assistance voting, please contact Morrow & Co., LLC, our proxy solicitor, at 1-800-607-0088.

Thank you for taking the time to vote your common units.  We appreciate your continued investment in Eagle Rock Energy.

Sincerely,

Joseph A. Mills

Chairman and Chief Executive Officer

P. O. Box 2968

Houston, TX 77252-2968

281-408-1200 Office WWW.EAGLEROCKENERGY.COM

* We have agreed to pay Morrow & Co., LLC approximately $11,500 for this service.