Bailey, recovering from right thumb surgery, pitched for the GCL Red Sox Wednesday. It was his first appearance in a game since Spring Training. He tossed a scoreless first inning, struck out two and allowed one hit.
"He felt really good, physically," said Boston manager Bobby Valentine Thursday. "First time, so there was a lot of check points he was going over but he felt good."
Bailey will likely need at least seven rehab appearances in the Minors before returning to the big leagues.
"There's going to be things that need to get checked off. When he does back-to-back [outings], coming in the middle of an inning, pitches in different situations," Valentine said. "I suspect it's going to be seven or eight appearances. I can't imagine it's going to be less than that."