Mike Chiappetta: Famed MMA Trainer Shawn Tompkins Dead at 37

Shawn Tompkins, the Canadian trainer who helped steer several fighters to mixed martial arts prominence, has died. He was 37 years old.

Known for a steady, guiding hand in developing his athletes, he was nicknamed "The Coach."

His death was confirmed by Mike Straka, a friend of Tompkins' who worked with him at TapouT.

Straka told MMA Fighting that Tompkins was in Canada at the time of his death with his brother-in-law Sam Stout and longtime fighter Mark Hominick. The cause is unknown pending an autopsy.

Tompkins' wife Emilie was in Las Vegas, where the couple lived.

The Ontario, Canada native fought as a professional mixed martial artist, but never won, going 0-4. But it was as a trainer that he made his mark in the sport, helping notable fighters like Stout, Hominick and Chris Horodecki to the big leagues.

As a trainer at Xtreme Couture, Tompkins was in the corner of Randy Couture for several of the legend's fights.

In 2009 though, he struck out on his own, leaving Xtreme Couture and moving to the newly opened TapouT gym in Las Vegas, where he was the head trainer. He also worked with former UFC light-heavyweight champion Vitor Belfort for several bouts.

More recently, he had worked with Hominick prior to his featherweight title loss to Jose Aldo at UFC 129.

Tompkins' death cast a pall of sadness over Sunday's UFC Live event in Milwaukee, as word of his passing spread as the main card was about to begin.