Kenny Johnson, Kevin Casey, Lew Polley and Jamie Yager The main card for WSOF’s trip to California later this month is coming together with the announcement of a pair of welterweight bouts. The additions were announced via a WSOF press release. WSOF 28 takes place Feb. 20 at Next Level Sports Complex in Garden Grove, Calif. The main card airs on NBCSN following prelims on MMAjunkie.