ORCHARD PARK, N.Y. (AP) -Bills starting linebacker Angelo Crowell will miss Buffalo's season opener against Seattle on Sunday, and is out indefinitely after having surgery on his left knee Thursday.
Coach Dick Jauron announced the news after Crowell missed practice, saying Crowell's decision to have arthroscopic surgery came as a surprise. Jauron said it was too early to tell how much time Crowell would miss.
Jauron said the surgery is related to a nagging injury that kept Crowell in and out of practice during training camp and forced him to miss two preseason games last month.
Yet Jauron said he didn't anticipate the injury was so severe Crowell would require surgery. The decision was made after Crowell consulted with team doctors Thursday, a day after he practiced with the team.
``It came pretty much out of the blue. It was certainly nothing that we saw coming,'' he said. ``It's not as we would've planned it or would have liked it certainly, but it's the way it is, so we'll just keep working. We'll go forward and be optimistic and be confident.''
The Bills' 2003 third-round draft pick, Crowell was entering his fourth season as a starter and was part of a revamped linebacker group that was rounded out by veteran free-agent addition Kawika Mitchell and Paul Posluszny, who missed all but three games of his rookie season with a broken forearm.
Backup Keith Ellison will start in Crowell's place on the strong side. Ellison, Buffalo's 2006 sixth-round draft pick, has proven to be a capable backup in his first two seasons.
Posluszny was held out of practice as a precaution on Thursday after he twisted his ankle a day earlier. Jauron said Posluszny's ankle was still sore, but he is expected to play.
Reserve defensive lineman Spencer Johnson practiced on a limited basis because of a sore back.

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