The right-hander was not moved at the trade deadline,
BOSTON - Hours after the trade deadline passed and Josh Beckett remained in Boston, the Red Sox pitcher left Tuesday night's start against Detroit with a back spasm.
He left to a chorus of boos after allowing an infield hit, hit by a pitch and walking the next two batters.
Beckett had retired the first eight batters he faced before Omar Infante's infield single began the Tigers' mini-rally. He left with a 1-0 deficit.