John Lackey left with a strained biceps in his first start since September 2011, grabbing his right arm in pain and coming out in the fifth inning Saturday as the Boston Red Sox lost to the Toronto Blue Jays 5-0.
Lackey (0-1) missed last season following elbow ligament-replacement surgery in November 2011. He allowed a two-run homer to J.P. Arencibia in the fourth, and then clutched his arm and jumped around the mound in pain after throwing low and inside to Jose Reyes on a 2-2 pitch with one out in the fifth
Teammates and manager John Farrell came to the mound before Lackey walked off with Red Sox trainer Rick Jameyson and was replaced by Alfredo Aceves, who threw ball four.
There was no immediate word on the severity of Lackey's injury, or how much time he might miss.
Lackey signed an $82.5 million, five-year contract with Boston in December 2009 after eight seasons with the Angels. He allowed two runs and five hits in 4 1-3 innings with eight strikeouts and one walk, throwing...