The Chicago Bears have released oft-injured linebacker Lamarr Houston.

 

Houston was placed on injured reserve after hurting his knee in the final preseason game and was let go Wednesday.

 

Houston was limited to 26 games in three years with the Bears because of injuries to both knees. His first season in Chicago ended when he tore his right anterior cruciate ligament celebrating a meaningless sack in a blowout loss at New England. Houston rebounded with eight sacks while playing in 16 games in 2015. But a torn ACL in his left knee last season limited him to two games.

 

Houston played for Oakland from 2010-13.

 

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No. 2 overall draft pick Mitchell Trubisky will open the season as the Chicago Bears' No. 2 quarterback.

 

Coach John Fox says Trubisky will back up Mike Glennon when the Bears host the defending NFC champion Atlanta Falcons on Sunday.

 

The Bears had said they would treat this as sort of a redshirt season with Trubisky behind Glennon and veteran Mark Sanchez. But after starting 13 games at North Carolina and working primarily out of the shotgun, the rookie has come along quicker than anticipated.

 

Fox says "everybody was pretty impressed" with how he is adjusting to the pro game. Trubisky dazzled at times in the preseason and sparked a debate in Chicago over who should start.