"They said they didn't have a couple days," Bailey said. "They couldn't wait around that long, I guess, so they wanted to make a move, which stinks. I think I would have been all right for tomorrow, but that's my opinion. It's not a move personally I like, but it's best for the team I guess. That's most important."
Bailey has a 4.39 ERA in 26 2/3 innings.
"We can't continue scramble to get through a game," Phillies manager Pete Mackanin said. "I don't want to use [Hector] Neris, [Jeanmar] Gomez and [David] Hernandez when I don't have to. He [Bailey] might be ready in three days, but we can't do that."
• Ramos' unlikely big league dream comes true
Ramos, the Phillies' No. 28 prospect, went 2-1 with a 1.16 ERA in 38 2/3 innings split between Double-A Reading and Lehigh Valley. His first appearance will be his big league debut.
The Phillies also announced that left-handed pitcher Daniel Stumpf is scheduled to begin his rehab assignment Friday with Class A Advanced Clearwater. He was suspended 80 games in April for violating the Minor League's performance-enhancing drug policy.
Stumpf is eligible to rejoin the team July 10.
"We want to keep him," Mackanin said. "He showed enough. When he's ready, he'll most likely come back."
Todd Zolecki has covered the Phillies since 2003, and for MLB.com since 2009. Read his Phillies blog The Zo Zone, follow him on Twitter and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.