SUNRISE, Fla. -- Ken Shamrock will not be fighting Kimbo Slice in the main event of EliteXC “Heat,” according to an official statement made Saturday by announcer Jimmy Lennon Jr. inside the BankAtlantic Center.

Seth Petruzelli, who was scheduled to fight Aaron Rosa on the undercard, has replaced Shamrock and will fight Slice.

Shamrock was medically disqualified Saturday by the Florida State Athletic Commission, after sustaining a cut from a headbutt during a light workout some time within the last 24 hours. In an interview on CBS, Shamrock said the cut required six stitches.

"I was warming up, getting loose, and caught a head and didn't think much of it. Next thing I know, a couple of drops were dripping from my head," Shamrock told CBS. "[We] went to look and hopefully glue it together or something, but it needed six stitches. We we're trying to figure out a way to do this, but we came down here and the commission said they weren't going to let me fight."

A commission official told CBS that Shamrock had received treatment from the Cleveland Clinic and that sutures were in place over his eye, preventing his participation.