Kirby Lee-USA TODAY Sports

One of Jon Gruden’s sons is continuing the family’s tradition of working in athletics, though he’s trying to make it in a different sport.

Gruden has three sons — Jon II (aka “Deuce”), Michael, and Jayson. Deuce is a competitive weightlifter who works in the Raiders’ strength department, Michael is a recent Tennessee graduate, and Jayson is trying to carve out a career as a combat fighter.

Episode 4 of HBO’s “Hard Knocks” featuring the Oakland Raiders aired on Tuesday night. In the episode, Gruden was shown doing some things away from the football field. That included making a visit with his wife Cindy to watch Jayson train.

Jon said that Jayson just graduated high school and will be going to a junior college in the Bay Area.

“He wants to be a professional fighter,” Gruden said of Jayson. “He’s serious about it, so we’re supporting him.”

Jayson trains at Combat Sports Academy in Dublin, Calif. In November, he had his first Muay Thai kickboxing fight and won.

“We all have a screw loose in our family, that’s for sure,” Coach Gruden said on "Hard Knocks" regarding his son’s decision to pursue a career in combat sports.

Maybe that is the case. We’re all better for it because that Gruden family sure is fun.

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