Byron Maxwell, Seattle’s starting right cornerback, made a leaping play to break up a pass intended for Dez Bryant in the end zone, an while he saved his team four points—Dallas kicked a field goal on the next play—he also suffered an ankle injury that caused him to miss the rest of the game and could keep him out longer.

“I think it’s a pretty good sprain,” Seahawks coach Pete Carroll said. “I think it’s legit, he couldn’t get up on it. I think it’s a high ankle sprain, but that’s a ‘think’ right now. I don’t know.”

With Maxwell out, Marcus Burley, usually Seattle’s nickel corner, moved outside, and because Burley was playing out of position, the Seahawks had Richard Sherman move around the field with Dez Bryant rather than stay at left corner. Steven Terrell, a safety signed off the practice squad on Saturday, played the nickel role with Burley on the outside.

Middle linebacker Bobby Wagner, the team’s leading tackler and one of their best players this season, left with a toe injury that kept him out for most of the second quarter, then he returned after halftime. The Seahawks used outside linebacker K.J. Wright, as well as rookie Brock Coyle in Wagner’s place while he was gone, a stretch that included an 80-yard touchdown drive by the Cowboys.

“He jammed his big toe and came back and played with it,” Carroll said. “We’ll see what that means, we don’t’ know right now. We’ll have to wait and see.”

Wagner was in a walking boot after the game, though it’s not uncommon for players to wear boots for even non-serious injuries to speed up the healing process.