Toby Gerhart

The Jacksonville Jaguars could be without running back Denard Robinson for several weeks.

Robinson, the backup to T.J. Yeldon, said Monday he sprained the medial collateral ligament in his left knee in a 23-20 win against Miami. Robinson left the game following a 9-yard run in the first quarter and did not return.

His injury leaves the Jaguars (1-1) thin at the position. Toby Gerhart missed the first two games with an abdominal strain. It's unclear whether Gerhart will be able to practice this week and play at New England (2-0) on Sunday.

Bernard Pierce is next up on the depth chart if Gerhart can't play in Week 3. It should be good news for Yeldon owners as the rookie should get a big workload.