Williams was drafted No. 27 by Carolina in 2006 and has spent the last nine seasons there. He is the Panthers' all-time leader in rushing yards (6,846) and rushing touchdowns (46).
The 31-year-old was limited to six games in 2014 because of a thigh injury, ankle injury and broken hand. He rushed for a career-low 219 yards on 62 carries, and his 3.5 yards per attempt was a career-low as well.
Williams has 18 100-yard rushing games in his career and was named to the Pro Bowl in 2009.
- Molly Geary