Seattle Seahawks linebacker K.J. Wright’s status for the start of the regular season is in doubt after he underwent arthroscopic knee surgery Monday, Brady Henderson of ESPN reports.

According to Seahawks coach Pete Carroll, Wright felt something in his knee following the team’s preseason loss to the Minnesota Vikings on Friday.

“He didn't get hit or anything or didn't have an episode, just felt that maybe something wasn't quite right and took a good look at it,” Carroll said. “So we're going to do a scope job and get him back really quick.”

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Carroll was unsure how long Wright will be out or if he'll be ready for Seattle's Sept. 9 opener against the Broncos in Denver. Carroll also confirmed that Wright underwent surgery on the same knee which he had treated to anti-inflammatory blood therapy last summer.

Wright, 29, has been one of the main stalwarts of the Seahawks defense ever since arriving in Seattle in 2011. He’s proven to be remarkably durable, playing in 107 out of 112 games over the past seven years. He’s also missed just one game in the last four years. He played in 15 games last season, racking up 108 tackles with one interception.

If Wright does miss out, rookie Shaquem Griffin would presumably be the top contender to take his place at the weakside linebacker spot. Griffin, the team’s fifth-round pick, has been backing Wright up this offseason and has impressed with his play this preseason. He had a particularly impressive preseason debut against the Indianapolis Colts, where he recorded a game-high nine tackles.