All-Pro running back Adrian Peterson injured his right ankle during the first half of the Minnesota Vikings' 17-13 victory over the Washington Redskins on Sunday and didn't return.
Peterson said his ankle "got rolled up" when he was tackled on a 1-yard carry late in the second quarter. Neither Peterson nor Vikings interim coach Leslie Frazier would speculate on the running back's prospects for next week's game against the Buffalo Bills.
"We'll know a little more about Adrian tomorrow," Frazier said, "after they do whatever examinations they have to."
The Vikings initially said Peterson was probable to return to the game, then downgraded him to questionable. He had his ankle taped, then stood on the sideline testing it, stepping gingerly at times and attempting short sprints.
"It started to throb a little bit," Peterson said. "I was trying to keep it loose, jogging, but it really didn't help out."