PITTSBURGH (AP) -Left-hander Stephen Randolph's contract was purchased by the Houston Astros from Triple-A Round Rock on Thursday, a day after reliever Rick White was injured warming up in the bullpen during a 16-inning game.
White, one of the Astros' most reliable relievers this season, strained a muscle in his left side while warming up to pitch the ninth inning of the 4-3 loss to Pittsburgh on Wednesday night. With White unavailable, Astros closer Dan Wheeler ended up pitching the ninth and 10th innings.
Randolph, 33, was 2-0 with an 0.84 ERA, striking out 18 and allowing six hits in 12 innings during five games at Round Rock. He was 10-6 with a 4.89 ERA in 95 appearances with the Arizona Diamondbacks in 2003-04, including an 8-1 record in 2003.
The right-handed White is 1-0 with a 1.54 ERA in eight games.
White was one of two players placed on the disabled list after getting hurt in the PNC Park bullpens on Wednesday. Pirates catcher Humberto Cota injured his left shoulder while warming up relievers and was replaced on the 25-man roster Thursday by Ryan Doumit.

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