Calhoun got hurt while running out a bases-loaded infield single that gave Texas a 3-2 lead with two outs in the 10th. He was replaced by pinch-runner Scott Heineman.
Calhoun is expected to get an MRI on Thursday. But manager Chris Woodward was not optimistic that Calhoun will avoid the IL.
“It doesn’t look great, to be honest with you,” Woodward said. “It looks like a pretty good pull. I don’t know the severity of it. I’m guessing it will probably be [injured list].”
The Rangers have outfielder Adolis Garcia traveling with the team on their taxi squad, so he would be available if Calhoun goes on the IL.