(CBS) The Bears made a series of minor roster moves Monday, most notably sending defensive end Lamarr Houston to the injured reserve list with a season-ending knee injury.

In his place, Chicago has elevated defensive end David Bass from the practice squad. The Bears also added tackle Jason Weaver to the practice squad.

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Houston tore his right ACL while celebrating a sack late in a blowout loss to the Patriots on Oct. 26. He had just eight tackles in eight games after signing a five-year, $35-million deal in the offseason.

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The 23-year-old Bass is in his second NFL season, both with the Bears. He played in 12 games last season, starting one, and has one appearance this season.

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Weaver entered the NFL in 2013 as an undrafted free agent out of Southern Mississippi.