"They want to make sure that I'm OK," Ruiz said. "[Saturday] when I woke up, maybe I was a little sore. But I feel good. I'm ready to go. We'll see how it goes."
Ruiz said he had a cramp, but Phillies head athletic trainer Scott Sheridan said through a team spokesman that Ruiz suffered a strain in his ribcage.
"Carlos might not feel like it's a strain but our trained medical staff has diagnosed it as such," Sheridan said through a spokesman.
Manuel said Ruiz is a "day-to-day situation." Kratz was recalled from triple-A Lehigh Valley, which suggested Ruiz would not play before Tuesday. The Phillies are off Monday.
"I'm glad he's not going to miss very much time," Manuel said. "That's good. That's great."
Ruiz missed 21 days with a right ribcage strain in 2009 and said this injury is not similar. He participated fully in batting practice Saturday and showed no ill effects. Initially, a stint on the disabled list was feared because of the original diagnosis from the team.
"Definitely I was worried," Ruiz said, "because you can lose at least two weeks and sometimes more than that. So I'm happy that I feel good."
In spring training, the Phillies objected to injury updates disseminated by Manuel and players. Members of the public relations staff said official injury queries should be directed toward front office executives.
Sheridan was not made available for questions Saturday, and when asked to verify what Manuel and Ruiz said regarding the injury, Proefrock said, "You've already asked them the question. So why are you asking me?"
To make room for Kratz, righthander B.J. Rosenberg was optioned to triple A. That left only five healthy relievers available because Antonio Bastardo remained sidelined with his self-inflicted workout room injury that created a gash above his swollen left eye.
Chase Utley (knees) played five innings at second base in a minor-league intrasquad game Saturday and went 2 for 3 with a walk. Utley made his first appearance in the field Friday with four innings of work.
Ryan Howard (Achilles) played in the same game and went 2 for 4 with a home run but did not run the bases. Afterward, he took grounders at first and did some light base- running activity.
In addition, Laynce Nix (calf) went 2 for 5 and played three innings at first base. He ran the bases after the game.
Utley is the lone player to have started an official rehab assignment. But with single-A Clearwater at its all-star break, camp games are the only opportunity for action.
Juan Pierre pinch-ran and stole a base in the 10th inning. It was the 568th steal of his career, tying him with Bid McPhee for 23d all-time.
Contact Matt Gelb at firstname.lastname@example.org or follow on Twitter @magelb.