The NFL has tweaked the rules to allow head coaches to delegate before each game the task of physically throwing the red challenge flag. On Thursday night, Patriots coach Mike Vrabel did not hand the function off — as evidenced by a windup and heave-ho that looked like something from a track and field competition.

After the game, Vrabel was asked by reporters whether the gesture was a message that he’ll be retaining the flag-throwing duties.

“I don’t think that that’s new because I think that there are other people,” Vrabel said. “I don’t know where this is getting so much traction. I think maybe it’s on a form now that it’s a designated…

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