This is the sixth straight season in which Ruiz has required a trip to the disabled list. He missed 20 games with a concussion in 2010.
"He'll be evaluated daily," Sandberg said. "He was just taking it easy."
Backup catcher Wil Nieves is also eligible to be activated Friday from the DL. He is in Clearwater, Fla., to rehab his strained right quadriceps.
The Phillies bullpen allowed seven earned runs in the team's 24 games prior to Saturday. Then five of the six hitters to face Antonio Bastardo in a 10-3, Game 1 loss to Atlanta scored.
Bastardo had not walked a batter or permitted an earned run all month (111/3 innings). He retired the eighth inning's first hitter. Atlanta followed that with a walk, single, walk, single, and bases-clearing triple. Bastardo threw a first-pitch strike just twice.
Luis Garcia's ERA dropped from 15.75 to 12.71 despite another allowed run. His ERA is 0.38 in 21 games at triple-A Lehigh Valley. He threw two wild pitches Saturday. "He was missing his spots by quite a bit," Sandberg said. . . . Jason Marquis, a little more than 10 months removed from Tommy John surgery, pitched six shutout innings Friday at triple A. He struck out six. Marquis, 35, could provide rotation depth later. . . . Infielder Ronny Cedeno started Game 1 at shortstop and was outrighted to triple-A Lehigh Valley afterward. That cleared space for Game 2 starter Sean O'Sullivan.