World Heavyweight Champion Alistair "The Demolition Man" Overeem (32-11) will make his highly anticipated return to action against heavy-handed knockout artist Brett "The Grim" Rogers (10-1) in the main event of a STRIKEFORCE mixed martial arts (MMA) extravaganza at Scottrade Center in St. Louis, Mo., on Saturday, May 15. In another heavyweight confrontation, Andrei "The Pitbull" Arlovski (15-7) will clash with Antonio "Big Foot" Silva (13-2).

Strikeforce Challengers: Woodley vs. Bears was a mixed martial arts event held by Strikeforce. The fifth Challengers episode took place on November 20, 2009 at the Kansas City Memory Hall in Kansas City, Kansas.

Titan FC 18: Pulver vs. Davidson was a mixed martial arts event held by the Titan Fighting Championships on Friday, May 27, 2011 at Memorial Hall in Kansas City, Kansas.