Speculation about a return to MMA lasted until March 24 , 2015 , when Lesnar announced in an interview on SportsCenter that he had re @-@ signed with WWE and officially closed the door on a return to MMA , even though he was offered a deal " ten times more " than what he had made previously in his MMA career . He further elaborated that , while he was training for months for a return to the UFC , he felt " physically great but something was lacking mentally " . Lesnar added that " [ he 's ] an older caveman now , so [ he ] makes smarter caveman decisions " and that he chose to sign with WWE instead of returning to MMA because he could " work part @-@ time with full @-@ time pay " .