Hafner had a cortisone injection in his right shoulder on Tuesday after an MRI examination showed tendinitis. Yankees manager Joe Girardi said that he might be able to use Hafner as a pinch-hitter on Thursday against the Mariners.
"I'm really encouraged by today," Hafner said. "Hopefully I'll be back out there soon."
Bryan Hoch is a reporter for MLB.com. Follow him on Twitter @bryanhoch and read his MLBlog, Bombers Beat. This story was not subject to the approval of Major League Baseball or its clubs.