CERTIFICATION OF PERIOD REPORT
I, Teresa L. Dick, Chief Financial Officer of Diamondback Energy, Inc. (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that, to the best of my knowledge:
(1) the Quarterly Report on Form 10-Q of the Company for the quarterly period ended September 30, 2012 (the “Report”) fully complies with the requirements of Section 13 (a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and
(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
Date: November 16, 2012
/s/ Teresa L. Dick
Teresa L. Dick
Chief Financial Officer