Indianapolis Colts quarterback Andrew Luck's arm issues may have worsened, as doctors are trying to determine whether he needs corrective surgery on his biceps tendon.
Chris Mortensen of ESPN reported Luck will begin a throwing regimen upon his return from Europe, which could indicate surgery is necessary.
Luck, 28, missed the entire 2017 season because of a slow recovery from January shoulder surgery.
This article will be updated to provide more information on this story as it becomes available.
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