The UFC and Spike TV are currently on the lookout for welterweights and middleweights for TUF 13. Open tryouts will take place on Nov. 4 in Las Vegas and applications must be received by Nov. 5.

To apply, competitors must be at least 21 years old with at least three professional MMA fights.

The open casting call will be held at the Red Rock Resort & Casino (Summerlin Ballroom) located in 11011 Charleston Blvd in Las Vegas. Registration on the day of the tryouts begins 8 a.m. until 9 a.m. local time. Applicants must bring own gear.

TUF 13 will begin taping in January 2011 with a premiere date in April. No coaches have been determined yet.

Middleweights most recently appeared on the show earlier this year on TUF 11, while welterweights last appeared on season nine. While the current season targeted lightweights and light heavyweights, the final roster contained only lightweights.