Batting with two outs in the bottom of the fifth, Phillips broke up Cardinals starter Jake Westbrook's no-hit effort with a lined single into center field. When the next batter, Zack Cozart, lined a single off of Westbrook's glove, Phillips scored from first base when the pitcher's errant throw sailed past first base down the right-field line.
Wilson Valdez replaced Phillips at second base. Phillips was removed as a precaution.
"I don't think it's too serious, but he probably won't play [on Tuesday] because you've got to get him well," Reds manager Dusty Baker said. "That's what you're always guarded against, especially playing your first game in the kind of chilly air out there. It's a thing you try to avoid. We've been good on leg injuries from Spring Training until now, except for Billy Bray's groin. Other than that, we've had none. We just have to take caution and hope it won't be too long."
Phillips, who became the 28th player in club history to record 1,000 hits on Sunday vs. the Marlins, was 1-for-3 in Monday's game. Through four games this season, he is batting .267 (4-for-15).