Gibson, a rookie, leads Washington with 659 yards rushing and 11 touchdowns. In the two games before his injury, he rushed for a combined 204 yards and four touchdowns. It's uncertain how much time Gibson will miss.
"It is concerning," Washington coach Ron Rivera said. "It is complicated for a running back because he's got to plant, cut, turn. I think the big toe -- that's where his power and energy that he runs with comes up."
With Gibson sidelined, Washington will rely on veteran Peyton Barber and third-down back J.D. McKissic. Barber has mostly served as Washington's short-yardage back this season; 26 of his 73 carries have come in situations that were either goal-to-go or with the team needing 2 yards or less for a first down. Barber averages 2.68 yards per carry and 0.86 yards after contact.
Rivera said Barber should be helped by getting the ball in more varied situations. Instead of just slamming into a hole to pick up a first down, Rivera said Barber can take a different approach on other downs.
"He may stutter-step to buy time for spacing to create [a hole]," Rivera said. "He may press something longer or come off it sooner. There is a different style."
McKissic has carried the ball 55 times for 231 yards and caught 56 passes for 408 more. Washington was having success with McKissic and Gibson on the field at the same time.
Receiver Terry McLaurin said Barber's physical style can mesh well with McKissic's change-of-pace style.
"We lose a little bit of that dynamic ability Antonio brings to the offense," McLaurin said. "We'd be lying if we said we won't miss Antonio, but those guys will help pick us up."