Reliever David Robertson, who suffered a bone bruise on his right foot a week ago, ran on a treadmill for 30 minutes Wednesday and could be back on the mound as soon as this weekend, manager Joe Girardi said.
Robertson discarded his walking boot and crutches Monday and played catch, saying he'd easily be ready for Opening Day. But Girardi said he's been out long enough that, when he returns, he will have to start off by throwing a few bullpen sessions.
"If everything goes OK, maybe we'll get there," Girardi said.
In other injury news, Girardi said outfielder Nick Swisher left Wednesday's game early with tightness in his left groin. Swisher wasn't scheduled to play Thursday against the Nationals anyway, so the Yankees will not run any tests and wait to see how he feels. Swisher was in the clubhouse during the final innings of Wednesday's game, showing no visible signs of any injury.
Infielder Eduardo Nunez, meanwhile, will continue to rest as he sits out with a right hand bruise. Nunez hasn't played since March 5, when he was hit by an Austin Hyatt pitch against the Phillies.