The Pittsburgh Steelers signed veteran running back DeAngelo Williams to a two-year contract. Williams is the Carolina Panthers' all-time leader in rushing yards and rushing touchdowns, but played in only six games last season and had a career-high 219 rushing yards and no touchdowns. The Panthers' first-round draft choice in 2006 out of Memphis totaled 6,846 rushing yards on 1,432 carries and 46 rushing touchdowns in nine seasons with Carolina. Williams had an injury-plagued 2014 campaign. A thigh injury and then an ankle injury forced him to the sideline for six of the Panthers' first eight games. Williams returned to play four consecutive games before breaking his hand at Minnesota and missing the final four regular season games. Follow me on Twitter: @RavensInsider Aaron Wilson covers the Ravens for The Baltimore Sun