Aug 17, 2012, 3:40 PM EST
Roy Oswalt will take his place, starting for the first time since July 30.
Dempster has been awful since coming to the Rangers in a trade from the Cubs, allowing 19 runs in 17 innings spread over three starts. And Oswalt wasn’t much better before being demoted to the bullpen, posting a 5.52 ERA in seven starts after joining the rotation in mid-June.
An impending free agent, Dempster signed off on a deal to the Rangers after the Braves and Dodgers also made a run at him prior to the July 31 deadline. Texas gave up minor leaguers Christian Villanueva and Kyle Hendricks to get him.
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