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HOUSTON (AP) -- Texans Pro Bowl linebacker Brian Cushing is out for the season with a left knee injury that will require surgery.

Cushing was injured in the third quarter of Sunday s loss at Kansas City during a low block by running back Jamaal Charles. It s the second straight year Cushing has been lost for the year with a left knee injury. He tore the anterior cruciate ligament in the same knee in Week 5 last season.

The Texans signed Cushing to a six-year contract worth $55.6 million before this season.

Coach Gary Kubiak said injuries to left tackle Duane Brown (ankle), running back Arian Foster (hamstring) and Ben Tate (ribs) aren t serious.

Kubiak also said rookies Cierre Wood, Sam Montgomery and Willie Jefferson were released for violating team rules.

Well, I won t discuss team rules and those types of things. I ll make decisions based on a body of work in everything I do. I ve got five months of work invested in those three young men and made a decision today to move forward, Kubiak said.

Kubiak added that they will use the vacated roster spots to try and fill needs at inside linebacker and special teams.

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