"The Steelers expect to have one of their most indispensable players Sunday when they visit Arizona.

All-Pro safety Troy Polamalu is likely to play against the Cardinals after passing a concussion test.

"We anticipate him practicing (Wednesday) and moving on throughout the week like everyone else on our football team," Steelers coach Mike Tomlin said Tuesday at his weekly news conference. "He met with our neurosurgeons, and they are very comfortable with where he is."

Polamalu, the reigning NFL Defensive Player of the Year, left last Sunday's 17-13 win over Jacksonville after taking out the legs of Maurice Jones-Drew and stopping the Jaguars running back for no gain."