Mathews, 27, played in only six games last season, rushing for 330 yards while dealing with a sprained MCL and an ankle injury. He spent each of his first five seasons with the San Diego Chargers after the team selected him in the first round of the 2010 draft.
Mathews has two 1,000-yard rushing seasons, but he has played in a full 16-game season just once in his career, when he rushed for 1,255 yards and six touchdowns in 2013.
Mathews has 4,061 career rushing yards and 23 rushing touchdowns, plus 146 receptions for another 1,110 yards.
- Scooby Axson