After his collegiate career was over, Mendenhall was signed by four NFL teams in 2009 and 2010, but he did not appear in an NFL game. Mendenhall hoped to be selected in the late rounds of the 2009 NFL Draft, and Sports Illustrated picked him as one of its 12 small school "draft sleepers." While Mendenhall was not drafted, he was signed by the Philadelphia Eagles in April 2009 as an undrafted free agent. He was waived on June 11, 2009.
