Lee was hitting .297 with four homers and 23 RBIs before straining his hamstring two weeks ago and going on the disabled list for only the second time in his career. The Astros activated him after Saturday night's 8-3 loss at Texas after he went 5-for-10 in three games on a rehab assignment at Double-A Corpus Christi. Brett Wallace was optioned to Triple-A Oklahoma City.
"He's not hitting for as much power, but he's at least a threat because of what he's capable of doing, and he can still reach the seats," Astros manager Brad Mills said of Lee. "He doesn't swing and miss very much and doesn't strike out a whole lot."
Wallace was called up when Lee was injured and had performed well while filling in for Lee at first base. He appeared in 11 games and hit .333 (12-for-36) with two homers and four RBIs. He went 0-for-3 with two strikeouts on Saturday.
"It's obviously not unexpected with Carlos coming off, so you're kind of prepared for it, but you definitely want to be here and be part of the guys and I did feel comfortable and had swung the bat well," he said. "It's just part of the game and I have to keep handling my business and hopefully get back here."