Manager Aaron Boone said Tuesday that Chisholm suffered a UCL injury in his left elbow, Chris Kirschner of The Athletic reports.
Boone noted that the team is still trying to determine the severity of Chisholm's injury, but he will almost certainly need to spend time on the injured list and may require surgery. The 26-year-old has slashed .316/.361/.702 with seven homers and 11 RBI in 61 plate appearances since joining the Yankees while primarily playing third base. Oswaldo Cabrera is likely to see regular reps at the hot corner while Chisholm is out.