TORONTO -- If Conor Jackson had been healthy, he most likely would have started on Thursday night against tough Blue Jays lefty Ricky Romero.
But the right-handed-hitting outfielder, acquired last week by the Red Sox, is still sore from a collision he had with the right-field wall at Fenway Park on Saturday.
While several of his body parts were sore, the injury that is keeping Jackson off the field is a contusion of his left knee.
"He's still a little sore -- we're trying to get him over the hump," said Red Sox manager Terry Francona. "He's done the stuff, the tee work, the hitting, and we're trying to get him available for the game. We don't know if we're there yet."