The Bengals boosted their offensive line when they signed Trent Brown, but the former New England Patriots tackle's season ended Saturday.

Cincinnati placed Brown on season-ending injured reserve after he suffered a brutal knee injury in the Bengals' loss to the Washington Commanders last Monday. The 10-year veteran's right leg was caught on the turf on pass protection, and he was carted off the field at Paycor Stadium.

Browns signed a one-year deal with Cincinnati last offseason after three seasons in New England where he won one Super Bowl.

The Bengals started the season 0-3 and faced an uphill battle without a top tackle protecting superstar Joe Burrow. First-round rookie Amarius Mims is expected to fill Brown's right tackle role for the rest of the season.

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Brown's IR designation was made before Cincinnati took the Carolina Panthers in Week 4 on Sunday.

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