Sore left knee may end Britton's season

Zach Britton retires Chase Headley to end the 8th, then strikes out Gary Sanchez in the 9th to end the game and earn a four-out saveBALTIMORE -- Orioles closer Zach Britton's season has been riddled with injuries, and due to concern over his left knee, it could end early.

"He's felt it all along, really, the last three years," manager Buck Showalter said of Britton's lingering knee problems. "It's nothing that we think is going to require any kind of surgery. It should heal itself in the offseason."

The Orioles will compare the results of a recently taken MRI with one taken in late August before making a final diagnosis. With the O's five games back of the second American League Wild Card and…