FOXBOROUGH, Mass. -- Washington Redskins rookie running back Derrius Guice said he suffered a hyperextended left knee at the end of a first-quarter run in Thursday's preseason opener against the New England Patriots but sounded optimistic, even as the club acknowledged he would undergo an MRI on Friday.
Saying he "felt good" and could "walk fine" and that "all is well," Guice detailed how the injury occurred at the end of a 34-yard run that was called back because of a holding penalty.
"At the back end of the play, when I was stiff-arming [a defender], my feet just kind of planted weirdly on the turf and my knee just hyperextended a little bit," he said. "It's fine."
Guice, a second-round draft choice out of LSU, had 19 yards on six carries before leaving the game. He hung around the locker room with teammates after the Redskins' 26-17 loss, sucking on a lollipop at his locker as he scrolled through his phone.
He later walked from the locker room to the team buses, and there was a noticeable stiffness in his stride.
"He popped a long run and unfortunately got a leg tangled up in the turf," Redskins coach Jay Gruden said. "Just one of those unlucky plays that unfortunately happens. Hopefully it's nothing. ... We'll find out [Friday]."
Guice sprained his left knee at LSU last season, but missed only one game. He has made a quick first impression on his Redskins teammates, including quarterback Colt McCoy, who said Guice has been "fun to watch" and is a "great player."
McCoy started in place of Alex Smith on Thursday night.
While the Redskins have been rotating their running backs in training camp, coaches have been pleased with Guice's development, and teammates anticipated him being the opening-game starter.
Gruden also said defensive lineman Matt Ioannidis will have an MRI for a knee injury.
ESPN's John Keim contributed to this report.