[JimStinson]

The white image above that on the white glove appears to be signed by Charley Goldman , Rocky's trainer.
When people would write to Rocky while he was training for a fight which was almost always Goldman would sign the stuff for him so as not to distract him from fight preparation. Goldman would sometimes do the same thing when things would be passed into the dressing room or gym. It was their job to see him CRANK out "SIT-UPS" not autographs