Polk averaged 4.8 yards per carry in games where he's had four or more carries. In those games, he has 42 carries for 203 yards and three touchdowns.
Polk is known as an aggressive one-cut runner.
He has eight touchdowns in 76 career touches. Polk has played in 30 of 33 games over the past two seasons.
The Eagles allowed Polk to seek a trade, eventually rescinding the low tender of $1.542 million. Over 10 teams expressed interest in Polk.
Polk was part of a crowded backfield with the Eagles after the additions of DeMarco Murray and Ryan Mathews.