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In the inaugural Strikeforce MMA event, former UFC Middleweight Champion (205 lbs.) Frank Shamrock fought against Cesar Gracie in a battle for California bragging rights. In the main event, Shamrock knocked Gracie out before more than 18,000 spectators in just 20 seconds. In other action, Sanshou kickboxing legend Cung Le made his MMA debut on the card, defeating Mike Altman with a first-round knockout, while Clay Guida became the first Strikeforce Lightweight Champion by defeating Josh Thomson.
Prior to the move to promoting MMA events, Scott Coker and company at Strikeforce were in the professional kickboxing business.