Pierce had surgery to repair his right rotator cuff in January. He did not miss any games in 2013, but was slowed by various ailments and averaged just 2.9 yards per carry. Pierce had better statistics as a rookie in 2012, when he rushed for 532 yards and averaged 4.9 yards per carry.
Pierce is one of six running backs on Baltimore's training camp roster, including rookies Lorenzo Taliaferro and Fitzgerald Toussaint.
Starting back Ray Rice faces a possible suspension after being indicted on aggravated assault charges.
- Dan Gartland