Heavyweight competitor Ben Davis (Pictures) suffered a moderate heart attack on Monday, forcing his withdrawal from a June 6 bout in PureCombat: Bombs Away at the Visalia Convention Center in Visalia, Calif.

Davis, 31, was admitted to Mercy Medical Center in Merced, Calif. after experiencing discomfort en route to a training session. His wife accompanied him to the hospital.

A prison guard lieutenant for the United States Penitentiary in Atwater, Calif., Davis said his condition was brought on by extreme stress. He said he is also embroiled in a custody battle for his three-year-old son.

"It wasn't major," Davis told Sherdog.com from his hospital bed on Tuesday. "I'm planning on making a full recovery and fighting again."

Davis scored an 11-second knockout over Scott Ball (Pictures) at a PureCombat event last February. He hopes to recover in time to compete on a PureCombat card scheduled for August.