Left tackle Jake Long, who was signed during the bye week, suffered an Achilles injury on the next-to-last play of a 26-20 loss to the Redskins.
Long had moved into the starting spot at Chicago on Oct. 31, but Vikings Head Coach Mike Zimmer said it is likely that Long is done for the season.
Sam Bradford said the injury to Long, who was a teammate of the quarterback when they were both with the Rams, only worsened a disappointing finish to the day.
“We were in St. Louis together and we both went through some injuries there, I know how difficult it is,” Bradford said.