"I think it's probably more than a couple of days but I'm not saying it's a DL," manager Joe Girardi said Sunday following a 6-2 win over the Tigers. "We'll have to see how he progresses in the next couple of days."
Swisher was removed from the game after earning a walk in the third inning Sunday. The team pulled him in the middle of Raul Ibanez's at-bat and sent him for a MRI, which revealed the strain.
Swisher was 0-for-1 with that walk and his replacement, Andruw Jones, hit a home run in the eighth that gave the Yankees the 6-2 lead.
Left fielder Brett Gardner is eligible to return off the disabled list on Thursday, which would be helpful if Swisher misses more than a few games. Gardner took about 25 swings Saturday for the first time since landing on the disabled list and was hopeful that he'll be ready to return for the four-game series against Kansas City, starting Thursday.
Jones and Ibanez will see time at the corner outfield spots with Swisher out.
"We'll see what happens tomorrow and we'll go from there," Girardi said about corresponding roster moves.
Swisher leads the Yankees with 23 RBIs and has belted six home runs to accompany his .284 average.
Matt Ehalt is a frequent contributor to ESPNNewYork.com.