Tight end Chris Cooley broke his right foot late in the second quarter of the Redskins' game against the Philadelphia Eagles on Monday night.
Cooley was hurt when he tried to change direction.
"He's got a break in his ankle," Coach Jim Zorn said. "It's on the inner side of his tibia. I haven't seen the X-rays yet, but we're quite certain it's broke or fractured in some way; we'll have a better diagnosis tomorrow. He'll be out for a while. I don't know that it's a season-ending injury yet. I can't say that."
Sources with knowledge of the matter said they expected Cooley to be out for the season.