"Steelers strong safety Troy Polamalu briefly scuffled with Ravens running back Ray Rice on Sunday. But that isn't what proved to be costly for the six-time Pro Bowler.

The NFL fined Polamalu $15,000 for making a horse-collar tackle in the Steelers' 35-7 loss to the Ravens, a league source said.

The tackle came late in the third quarter at the end of a 26-yard run by Ravens running back Ricky Williams."