Seattle defensive end Chris Clemons sacks Rams quarterback Sam Bradford. (Whitney Curtis/Getty Images)

How to stop him: Williams strained his medial collateral ligament in last week’s game, but hopes to play Sunday in Seattle. He’ll have to be aggressive with Clemons, who isn’t always the strongest at the point of attack. Using his size advantage, the 6-foot-5, 318-pound Williams will work to keep Clemons at bay and give Grossman time to throw.

Bottom line: Williams isn’t 100 percent, but he believes that he still can be effective against Clemons. Outside of Clemons, the Seahawks don’t really boast another dominant pass-rusher, with linebacker Leroy Hill as the other player with multiple sacks (and he has just two). Still, Seattle’s defense is effective, ranking 11th in the league in total yards (330) allowed, and is stout against the run, ranking eighth in the league, limiting opponents to 100 yards a game.