The NFL announced a one-game suspension Monday for Tennessee Titans safety Michael Griffin for a blow which knocked out Raiders tight end Mychal Rivera.

Rivera, who had his helmet knocked off on the play, sustained a concussion and did not return to the game. Griffin drew a personal foul on the play.

According to an NFL release, Griffin was suspended by NFL vice president of operations Merton Hanks for beat a repeat violator of the ban on hits to the head and neck area of defenseless receivers.

The violation was the second this season by Griffin and fourth since 2011.

"At the end of the day, as a defensive player, you're damned if you do, damned if you don't," Griffin said following the game. "If he catches the ball, first down, they're right there in scoring position . . . more than likely I'm going to see a fine from the commissioner and I've just got to go from there and play football."

For more on the Raiders, visit the Inside the Oakland Raiders blog at ibabuzz.com/oaklandraiders. Follow Jerry McDonald on Twitter at twitter.com/Jerrymcd.