The Pittsburgh Steelers' Troy Polamalu (43) delivers a blow to the Green Bay Packers' Greg Jennings as Jennings makes a reception for a touchdown during the first half of the NFL Super Bowl XLV football game on Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Charlie Riedel)

Photo by: Charlie Riedel

The Pittsburgh Steelers' Troy Polamalu (43) delivers a blow to the Green Bay Packers' Greg Jennings as Jennings makes a reception for a touchdown during the first half of the NFL Super Bowl XLV football game on Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Charlie Riedel)