Running back Rashard Mendenhall is retiring from the NFL at the age of 26. Agent Mike McCartney confirmed via Twitter on Sunday that Mendenhall had decided to end his playing career after six NFL seasons, all but one of them with the Pittsburgh Steelers. Mendenhall, the Steelers' first-round draft pick and 23rd overall selection out of Illinois in 2008, gained 4,326 career yards, averaging 3.9 yards per carry. More...