The NFL announced Wednesday that Brandon Browner immediately will start serving his four-game suspension for violating the NFL's performance-enhancing substances policy and miss the Seahawks' final four regular-season games.
The Associated Press reported Browner had dropped his appeal of the four-game ban and that Walter Thurmond would start in his place. It's possible Browner wanted to be available if the Seahawks made the playoffs.
"I've been disappointed about the whole situation, that it is something that he had to deal with it and we had to deal with it, but there is nothing we can do at this point," Seahawks coach Pete Carroll said, via The Associated Press.
NFL.com's Ian Rapoport confirmed that Seahawks cornerback Richard Sherman's appeal of his four-game suspension for the same offense is scheduled for Dec. 14. Sherman can play while his appeal is pending.
Follow Gregg Rosenthal on Twitter @greggrosenthal.