WSOF 33 is down a fight after a hip injury suffered by Clinton Williams forced the promotion to scrap his bout with Bruno Santos.

WSOF President Ray Sefo notified MMAjunkie of the change.

WSOF 33 takes place at Kansas City Memorial Auditorium in Kansas City, Kan. A special three-hour main card airs on NBCSN. Williams (7-4) and Santos (14-2) were scheduled to meet on the MMAjunkie-streamed preliminary card.

Santos has been moved to WSOF 34, where he will face an opponent still to be named. The fight will be his first bout since being released from the UFC following a 1-2 stint in the world’s biggest MMA promotion.

WSOF 34 takes place Nov. 12 at Budweiser Events Center in Loveland, Colo., near Denver. The main card, including welterweight champion Jon Fitch (28-7-1) vs. Jake Shields (31-8-1), airs on NBCSN following prelims on MMAjunkie.

Williams is on a two-fight losing skid in the promotion and has dropped three of his four most recent fights. Williams will be rescheduled for a future event once he recovers from his hip flexor injury.

With the change, WSOF 33 now includes:

MAIN CARD (NBCSN, 11 p.m. ET)

Champ Justin Gaethje vs. Ozzy Dugulubgov – for lightweight title

Champ David Branch vs. Vinny Magalhaes – for light heavyweight title

Jason High vs. Joao Zeferino

Luiz Firmino vs. Brian Foster

Abubakar Nurmagomedov vs. John Howard

Shawn Jordan vs. Ashley Gooch

PRELIMINARY CARD (MMAjunkie, 8 p.m. ET)

Chris Gutierrez vs. Timur Valiev

Jesse Brock vs. Bekbulat Magomedov

Mike Arrant vs. Abu Azaitar

Islam Mamedov vs. Alonzo Martinez

Bobby Cooper vs. Magomed Magomedkerimov

Bryce Mitchell vs. Brandon Phillips

For more on WSOF 33 and WSOF 34, check out the MMA Rumors section of the site.