Reds center fielder Shin-Soo Choo was out of the lineup Sunday, one day after he had to be scratched with back spasms.

"He's still a little sore, but I had him off today anyway," Reds manager Dusty Baker said. "He just came in for treatment. I have him as kind of a question mark [on Monday]. You know how those backs are. You can treat them, do whatever you want, but they let you go when they feel like it. He's never had any back problems, he said, before."

Choo, who was acquired in a December trade from the Indians to be the Reds' new leadoff hitter, is batting .400 (10-for-25) and has seven hits in his last 11 at-bats.