Frank Shamrock, center, is helped by his corner after losing to Nick Diaz in a Strikeforce mixed martial arts fight on Saturday, April 11, 2009, in San Jose, Calif. Diaz won by knockout in the second round.
Jeff Chiu, AP
Nick Diaz makes his way to the cage at the Strikeforce show on Saturday, April 11, 2009, in San Jose, Calif.
Tom Casino, Strikeforce
Nick Diaz punches Frank Shamrock during their match in the Strikeforce show on Saturday, April 11, 2009, in San Jose, Calif.
Tom Casino, Strikeforce
Nick Diaz punches Frank Shamrock during their match at the Strikeforce show on Saturday, April 11, 2009, in San Jose, Calif.
Tom Casino, Strikeforce
Frank Shamrock punches Nick Diaz during their match at the Strikeforce show on Saturday, April 11, 2009, in San Jose, Calif.
Tom Casino, Strikeforce
Nick Diaz grapples with Frank Shamrock during their match at the Strikeforce show on Saturday, April 11, 2009, in San Jose, Calif.
Tom Casino, Strikeforce
Nick Diaz, right, kicks Frank Shamrock in a Strikeforce mixed martial arts fight on Saturday, April 11, 2009, in San Jose, Calif. Diaz won by knockout in the second round.
Jeff Chiu, AP
Nick Diaz, top, punches Frank Shamrock during a Strikeforce mixed martial arts fight on Saturday, April 11, 2009, in San Jose, Calif. Diaz won by knockout in the second round.
Jeff Chiu, AP
Nick Diaz, top, punches Frank Shamrock in a Strikeforce mixed martial arts event on Saturday, April 11, 2009, in San Jose, Calif. Diaz won by knockout in the second round.
Jeff Chiu, AP
Actor Mickey Rourke holds up his phone before Nick Diaz faced Frank Shamrock in a Strikeforce mixed martial arts event on Saturday, April 11, 2009, in San Jose, Calif.
Jeff Chiu, AP