"Really disappointed but I'm actually not surprised after what I saw the last four games, especially the swing," Rangers manager Chris Woodward said. "I think it's been bothering him for a little bit."
Gallo is hitting .252 with 22 homers and 49 RBIs this season, but was mired in a 1-for-28 slump over his last seven games before the surgery. The lone hit was a solo home run against Arizona on July 16.
Woodward noted that Gallo has been dealing with various health issues for much of the year. Gallo was out for more than three weeks in June with a left oblique strain. Because of the type of surgery he had, Gallo can begin rehabbing very soon.
"He's had some nagging things this year and always tried to play through them, always trying to convince me, 'I'm good, I'm good,'" Woodward said. "After that game (Tuesday), 'It's killing me, it really hurts.' That was surprising to hear."
Willie Calhoun was called up from Triple-A Nashville. In another set of moves, the Rangers acquired right-hander Shane Carle from the Atlanta Braves for cash and optioned him to Nashville. To make room for Carle on the 40-man roster, right-hander Kyle Dowdy was reinstated from the 10-day injured list and designated for assignment.
Dowdy was on a rehab assignment at Nashville. He was placed on the injured list June 1 with a right elbow impingement. Carle was 4-2 with a 5.13 ERA in 20 games, including one start, at Triple-A Gwinnett in the Braves organization. He was designated for assignment Wednesday by Atlanta.
Carle spent last season in Atlanta's bullpen, going 4-1 with a 2.86 ERA in 53 appearances.
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