Buffalo Bills running back LeSean McCoy exited Sunday's game against the Indianapolis Colts in the first quarter with a head injury.
McCoy, who was ruled out for the contest, fell hard on his helmet after he was hit along the sideline on a 1-yard rush. He later walked to the sideline under his own power before being evaluated in the medical tent.
The 30-year-old McCoy finished with two carries for one yard. He was replaced by Chris Ivory, who ripped off a season-high 21-yard run early in the second quarter.
McCoy has endured a tough season, as he did not finish a Week 2 contest against the Los Angeles Chargers after sustaining cracked rib cartilage. He missed the following week as a result.
McCoy has rushed for 244 yards and has 13 catches for 85 yards this season. He has yet to reach the end zone, however.
McCoy has 2,248 carries for 10,336 yards with 66 touchdowns while also catching 454 passes for 3,463 yards and 15 scores in 139 career games with Buffalo and the Philadelphia Eagles. He was a second-round pick of Philadelphia during the 2009 NFL Draft.
He has been the subject of trade speculation in recent weeks ahead of the Oct. 30 deadline.