CHICAGO -- Perhaps Ryan Sweeney could have kept playing through the pain caused by the irritation in the sesamoid bone in his left foot. But the Red Sox decided it made more sense for the left-handed hitter to go on the disabled list and regain his health, so that's what he did before Sunday night's game against the Cubs.
Ryan Kalish was promoted from Triple-A Pawtucket to replace Sweeney on the roster.
"You know, he's moving decent in the outfield, he's doing everything he can," Red Sox manager Bobby Valentine said. "I mean, he's a trooper. We knew we needed him and we were short and he kept going out there. It just got to a point where it was really adversely affecting his swing."
Sweeney got a cortisone shot to alleviate the pain, but that also means he needs to stay off his foot for a few days.
"It's just one of those things where I'm not even able to run for like a week or something like that," Sweeney said. "We really don't have enough players right now to be doing that because [Daniel] Nava had a cortisone shot, too. I guess I was just an odd-man out."
Sweeney, who is hitting .292 with no homers and 13 RBIs, didn't dispute that the injury might have been affecting his performance.
"Basically, I have bone on bone, or something like that," Sweeney said. "And it's on my back foot when I swing, I'm kind of just out in front of everything right now because I can't really sit on my back side.
"I try not to think about it when I'm out there. It hurts after I get done running. I'd like to say that it didn't affect me. I've gotten lucky because I haven't gotten a lot of balls the last couple days. But playing center field, you cover a lot of ground, you've got to try to get what you can. I'm just kind of limited."