Green Bay Packers' Clay Matthews (52) tackles Pittsburgh Steelers' Rashard Mendenhall (34) and causes him to fumble during the second half of the NFL Super Bowl XLV football game Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Kathy Willens)

Photo by: Kathy Willens

Green Bay Packers' Clay Matthews (52) tackles Pittsburgh Steelers' Rashard Mendenhall (34) and causes him to fumble during the second half of the NFL Super Bowl XLV football game Sunday, Feb. 6, 2011, in Arlington, Texas. (AP Photo/Kathy Willens)