Papelbon, attempting his 36th save of the season, felt a burning
sensation in his shoulder during the 2-1 win over Toronto. He
expects to have an MRI Monday.
"Best case scenario, I'll be back in five, six or seven days,"
he said before Boston's 5-1 loss to the Blue Jays on Saturday. "It
just feels weak and fatigued. I'm going to try and stay positive,
hopefully I can pitch in a week or so."
Papelbon has converted 35 of 41 save opportunities, third-best
among rookies in the major league history.
Papelbon ran into trouble in the ninth on Friday, leaving with
runners at second and third and one out. He was replaced by lefty
Craig Breslow, who was called up from Triple-A Pawtucket earlier
Breslow and Mike Timlin closed out Boston's win, its second
straight over the Blue Jays.
Asked if it felt any better before Saturday's game, he said: "A
little bit , not a whole lot. I'm still trying to get juiced back