X0303 4 2010-06-21 0 0001364541 EAGLE ROCK ENERGY PARTNERS L P EROC 0001377295 Weinzierl John A EAGLE ROCK ENERGY PARTNERS, L.P. P.O. BOX 2968 HOUSTON TX 77252 1 0 0 0 Common Units Representing Limited Partner Interest 2010-06-21 4 X 0 3080 2.5 A 11880 I See note (6) Subscription Rights 2.50 2010-06-21 4 X 0 3080 0 D 2010-06-01 2010-06-30 Common Units and Warrants 3080 0 I See note 6 Warrants 6 2010-06-21 4 X 0 3080 2.50 A 2010-08-15 2012-05-15 Common Units 3080 3080 I See note 6 Represents common units that will be received, after the close of the rights offering, from the exercise of subscription rights. Represents the exercise price of each subscription right entitling the holder to acquire, for $2.50 in cash, (i) one common unit and (ii) one warrant to purchase an additional common unit for $6.00 on the dates specified in Footnote 5. Each Warrant entitles the holder to acquire, for $6.00 in cash, one common unit on the dates specified in Footnote 5. Represents warrants that will be received, after the close of the rights offering, from the exercise of subscription rights. Warrants are only exercisable on each of August 15, 2010, November 15, 2010, March 15, 2011, May 15, 2011, August 15, 2011, November 15, 2011, March 15, 2012 and May 15, 2012. The warrants will be freely tradeable starting on or about July 1, 2010 until May 15, 2012. These securities are held by WCFB Interests, LP, a limited partnership which the reporting person controls. The reporting person is a Director of Eagle Rock Energy G&P, LLC the general partner of Eagle Rock Energy GP, L.P. the general partner of registrant. /s/ Charles C. Boettcher, Attorney-In-Fact 2010-06-22