Seahawks DE Cliff Avril out indefinitely with hamstring injury

Seattle Seahawks defensive end Cliff Avril is out indefinitely with a hamstring injury.

Avril has been fighting numerous injuries in the past year. He suffered an injured foot during the spring and missed a significant amount of the Seahawks' training camp with a hamstring injury that has now been aggravated.

In an interview with 710 ESPN on Monday, Seattle's coach Pete Carroll said he didn't know when Avril will be back.