Jens Pulver
Vazquez faced and defeated former UFC Lightweight Champion and former WEC featherweight title challenger Jens Pulver via armbar on March 6, 2010, at WEC 47. He defeated decorated grappler Mackens Semerzier via second round submission on August 18, 2010, at WEC 50. Vazquez was defeated by Chad Mendes via unanimous decision on November 11, 2010, at WEC 52.