With about a minute left in the first quarter, McCoy took the ball around the left end for a nine yard gain before being hit helmet-to-helmet by Redskins cornerback David Amerson.
McCoy was visibly dazed, and staff from both teams rushed to his aid. After staying on the turf for a few moments, McCoy made his way to the sideline where he visibly mouthed he was "OK."
He was cleared to play again within about five minutes. NFL concussion evaluation procedures generally take about 10-15 minutes, according to Deadspin's Timothy Burke.
The hit is below, via @gifdsports.
- Will Green