An MRI revealed that Minnesota Vikings running back Adrian Peterson tore the ACL in his left knee during Saturday's 33-26 win over the Washington Redskins.

Coach Leslie Frazier will give an update of the injury during his 12:30 p.m. CT news conference on Monday.

A source with knowledge of the situation told ESPN's Josina Anderson that the MRI also revealed that Peterson tore the MCL in his left knee as well. According to the source, the team intends to confirm the torn MCL at Monday's news conference.

Peterson said earlier Saturday that he knew "it was something bad" the moment he was hit and that he was in "severe pain" as he lay on the field.