Washington running back Adrian Peterson told Josina Anderson of ESPN he has a Grade 1 high ankle sprain and a Grade 2 low ankle sprain but is "good" ahead of the team's Thursday night matchup with the Minnesota Vikings.
Peterson managed 81 yards on 20 carries in Washington's loss to the San Francisco 49ers. The running back's injury was revealed when Peterson appeared on the team's injury report for Week 8.
Peterson managed to do a solid job of staying on the field early on in his career, appearing in at least 14 games in six of his first seven seasons.