PITTSBURGH -- Steelers safety Troy Polamalu may not be ready to play Sunday in Miami.

Polamalu, out for the last six games and most of a seventh with a left knee injury, began running in a straight line only Monday. He has yet to begun cutting, turning or twisting, moves needed to play in a game.

Coach Mike Tomlin said Tuesday the five-time Pro Bowl player would be limited if he practices this week. Polamalu said recently he hoped to return for the Dolphins game.

Polamalu ...

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