Washington Redskins quarterback Robert Griffin III (10) is examined after an injury during the first half of an NFL preseason football game against the Detroit Lions, Thursday, Aug. 20, 2015, in Landover, Md. (AP Photo/Alex Brandon)

Washington Redskins quarterback Robert Griffin III (10) is examined after an injury during the first half of an NFL preseason football game against the Detroit Lions, Thursday, Aug. 20, 2015, in Landover, Md. (AP Photo/Alex Brandon)

Washington quarterback Robert Griffin III left an Aug. 20 game with a concussion as Washington’s NFL team defeated the Detroit Lions, 21-17, in their home preseason game at FedEx Field in Landover, Md.

Griffin’s disappointing performance wasn’t entirely his fault—Washington’s offensive line was nearly nonexistent, as Griffin was pummeled and pounded after nearly every pass play during his time on the field.

After a rough first quarter, Griffin surprisingly came out for a fourth series in the second quarter. Griffin was sacked for the third time of the night and fumbled the ball. To make a bad situation worse, Griffin was injured when he went to recover the loose ball, and Lions defensive lineman Corey Wootton fell on top of him. He lay on the ground for several minutes before walking off on his own strength, and giving the crowd a thumbs-up.

Washington Redskins quarterback Robert Griffin III fumbles the ball as he’s sacked by Detroit Lions defensive end Tyrunn Walker, top, and defensive end Ezekiel Ansah, right, during the first half of an NFL preseason football game, Thursday, Aug. 20, 2015, in Landover, Md. (AP Photo/Alex Brandon)

“We gave up some pressure tonight, no doubt about it,” head coach Jay Gruden said. “We’ve got to do a better job of protecting the quarterback, better steam-wise and stay out of those nasty third-and-longs.”

On the bright side, Washington’s running backs were explosive, and showed great promise to alleviate some of the workload from Alfred Morris. Matt Jones culminated a 10-play, 80-yard drive with a 1-yard rushing touchdown. Trey Williams led all running backs with 10 carries for 52 yards. Washington’s NFL team rushed for a total of 179 yards.

Colt McCoy and Kirk Cousins battled for the coveted backup quarterback position, especially with the uncertainty surrounding Griffin. McCoy played well, finishing 5-of-6 passing attempts for 80 yards and one touchdown. Kirk Cousins was equally effective as

Washington Redskins quarterback Kirk Cousins (8) turns out of the pocket during the second half of an NFL preseason football game against the Detroit Lions in Landover, Md., Thursday, Aug. 20, 2015. The Washington Redskins defeated the Detroit Lions 21-17. (AP Photo/Alex Brandon)

third string. He passed twice in the fourth quarter for at least 20 yards, and converted 8-of-12 throws for 91 yards and a touchdown.   

Matthew Stafford started at quarterback for Detroit, but he was done after the first quarter, completing 6-of-8 passing attempts for 78 yards.  

Backup quarterback Dan Orlovsky clicked with running back Zach Zenner, who led the team in both rushing and receiving for 81 total yards.

Both teams were without their star wide receivers. Desean Jackson is still out with a shoulder injury, and although Calvin Johnson is healthy, Detroit isn’t taking any chances. Ryan Grant started in place of Jackson, while Corey Fuller stepped up in Johnson’s place.  

Next: Washington will head over to Baltimore to face the Ravens in Week Three of the preseason on Aug. 29.