When we last saw Foster play significant snaps in 2014, he was undeniably one of the hardest-running players in the NFL. He topped 1,500 yards from scrimmage in only 13 games and is a rare complete back in a league short on them. Then again, his next team should realize that he would be better off used as a part-time player. Foster is 30 years old and has missed 23 of his last 40 games. A torn Achilles tendon is a very difficult injury for a running back to recover from at any age.