Christian Darrisaw

NFL Network’s Ian Rapoport reports Vikings LT Christian Darrisaw (knee) will undergo season-ending knee surgery.

Darrisaw left the Vikings’ Thursday matchup with the Rams late in the second quarter because of the knee issue. He underwent an MRI this morning that revealed an injury severe enough to require season-ending surgery, though Rapoport didn’t report the exact nature of the problem. David Quessenberry took his spot in the lineup in the second half. Darrisaw is one of the best left tackles in the league and signed a $113 million contract in the offseason. His loss will be a notable blow to an offense that has played stunningly well under journeyman Sam Darnold.