Boston Red Sox right-hander John Lackey re-injured his throwing arm in his return from elbow surgery Saturday against the Toronto Blue Jays.
Lackey, who had not pitched in almost 1 1/2 years, hurt his right arm in the fifth inning after throwing a two-strike pitch in the dirt to Blue Jays shortstop Jose Reyes.
Lackey clutched his arm in agony after the pitch as teammate Dustin Pedroia, manager John Farrell and team trainer Rick Jameyson ran to the mound. He left the game with his arm hanging at his side. He was replaced by Alfredo Aceves.
The 34-year-old last pitched on Sept. 25, 2011, against the New York Yankees.
Before the injury, Lackey was throwing well Saturday with his fastball reaching 94 mph.