The 49ers’ defense has struggled to get stops the last three weeks. They’re allowing 35.3 points per game over their last three. That’s not going to earn a victory over the Seahawks with the NFC West on the line.

San Francisco’s defense has likely suffered too many injuries to reach the historically great form it found early in the year, but they’re still talented enough to string together stops against a banged up Seahawks offense.

These are the players on the 49ers defense that’ll have the biggest impact on Sunday’s game:

DE Nick Bosa

The 49ers’ stellar rookie has only one sack in his last four games. He’s still impacting opposing quarterbacks by collapsing the pocket and forcing throwaways, but he has to have his best game of the year Sunday. Seattle’s offensive line already struggles, and they’ll be without starting left tackle Duane Brown. Not only does Bosa have to stay disciplined getting after a mobile quarterback in Russell Wilson, but he has to be strong in the run game as well. Not collapsing early and surrendering the edge will be as vital as making sure Wilson doesn’t get comfortable. Bosa has played a ton of snaps this year, but a strong outing Sunday likely gets him and the 49ers week off heading into the postseason.