Justin Gaethje and Brian Foster WSOF lightweight champion Justin Gaethje (16-0) is still perfect through 16 professional contests, defending his belt for the fourth consecutive time with a fist-round finish of Brian Foster (25-9). The contest served as the headlining bout of Saturday’s WSOF 29 event, which took place at Bank of Colorado Arena in Greeley, Colo. The main card aired on NBCSN. It was Foster who was the aggressor at the bell, coming out with punches and kicks in the face of an always aggressive opponent