An already shaky Washington State offensive line was dealt a significant blow over the weekend.

Cougar coach Jake Dickert revealed to reporters that left tackle Jarrett Kingston is out for the rest of the season after suffering an apparent leg injury in the win over Stanford. Kingston has been Washington State’s unquestioned best offensive lineman this season, holding firm at left tackle and protecting quarterback Cameron Ward’s blind side.

“The biggest thing I want to say about Jarrett is he’s been a warrior,” Dickert said. “I’m disappointed for him because he has worked so hard to get to this point. I firmly believe Kingston is an all-conference offensive lineman. I think he has put it on tape. He’s been a warrior each and every game, and I’m sad for our team that he won’t be able to finish these last three games and improve the type of performer that he is.”

Kingston was knocked out of Saturday’s 52-14 win over Stanford midway through the second quarter. He was helped off the field unable to put any weight on his right leg.

In his place, Wazzu will turn to one of Christian Hilborn, Grant Stephens, or Jack Wilson. When Kingston left the guard, Hilborn kicked out from left guard to left tackle and Ma’ake Fifita took his spot at guard.

Nothing is set in stone, though. The Cougs have used a number of different offensive line configurations this season trying to find one that works. They’ve given up a conference-high 30 sacks in nine games.

Kingston had yet to allow a single one. He started at guard the previous two years but moved to tackle this offseason. In doing so, he has put himself on the radar of draft scouts.

Washington State hosts Arizona State Saturday at 12:30 p.m. PT on the Pac-12 Network.