Chandler is confident he can beat his big brother if they stepped into the octagon, and wants to set up a one-round charity fight to prove his point.

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TMZ spoke with a Patriots official, who said, “It’s not a matter of if we’d allow Chandler to fight his brother. We can’t stop the players from doing what they want. But he might be voiding his contract obligations to the team if he went out and did it.

“Without getting into a specific contract, there have to be clauses [in contracts] that protect the team, like restrictions of physical activity that would risk injury. Whether it be skiing, jumping out of a plane or riding a motorcycle without a helmet in a state that requires one.

“I think they’re having fun, but do I think fighting is something they’re actually serious about? No.”

Patriots tight end Rob Gronkowski is reportedly helping Chandler train for the fight.