Brock Lesnar Net Worth: $22 million Birthday: July 12, 1977 Education: University of Minnesota Getty Brock Lesnar Avenges Loss to Frank Mir On This Day in 2009 It’s been 16 years since UFC 100, when Brock Lesnar capped off the milestone event with a statement win. Lesnar successfully retained his heavyweight title against Frank Mir in the main event of a stacked card. Lesnar vs. Mir drew plenty of interest. The bout was a title unification bout, with Mir entering as the interim heavyweight