Super heavyweight fighter Ross Clifton, known for his loss to veteran Ken Shamrock at a February War Gods event, has passed away at age 32 from an apparent heart attack, MMA Weekly reports:

Clifton’s former trainer, UFC veteran Cal Worsham, said the Rancho Cordova fighter was found dead by his wife Friday morning. Clifton was reportedly watching TV in a recliner chair when the wife went to bed Thursday night.

“He was a jovial teddy bear inside of a grizzly’s body,” Worsham told MMAWeekly on Saturday. “He was just so funny and such a character in the way you’d never expect from a giant of a man like that. He’s absolutely going to be missed.”

Clifton fell to 6-10 after suffering a first-round TKO loss to Rick Vardell at a July 31 Gladiator Challenge event in his most-recent bout.

The 380-pound fighter, nicknamed “The Grizzly,” was submitted by Shamrock in the opening round of their February 13 matchup, after which Shamrock was suspended for one-year due to a positive steroid test.