ARLINGTON -- Scott Feldman tossed eight scoreless innings in his last start. Roy Oswalt gave up eight runs in Monday's loss to the Angels. When the Rangers traded for the Cubs' Ryan Dempster on Tuesday, one of them had to go to the bullpen.
Feldman, who has bounced back and forth between being a starter and a reliever, remained in the rotation while Oswalt, who has spent his entire 16-year professional career as a starting pitcher, was sent to the bullpen.
"It's just where we are in the season. Like a lot of things, nothing is permanent," general manager Jon Daniels said. "The other guys are throwing the ball well. We're going to put the best club out there that gives us the best chance to win that day. Feldman has earned the right to be out there."
In his last six appearances -- five starts and one relief outing -- Feldman is 5-0 with a 2.91 ERA after starting the season 0-6 with a 6.50 ERA across seven starts and five relief appearances. In Sunday's win, Feldman, a 17-game winner in 2009, blanked the White Sox over a career-high eight innings, needing just 88 pitches to do so.
"In the beginning of the season, I was just mad about things I had no control over," Feldman said. "That's not a very good mentality to have. It doesn't really do any good for myself or the team. I just kind of let everything go and then tell myself that when I get in there, I'm going to do my best.
Oswalt, who was 2-0 with a 1.50 ERA in his two previous starts, gave up eight runs on 11 hits in 5 1/3 innings on Monday night, allowing three home runs for the second time in his last four starts. After allowing one run in 6 1/3 innings during a win over the A's on July 17, he was scratched from his next start with back stiffness and fell to 3-2 with a 6.49 ERA on Monday. Opponents are hitting .358 off him this season.
"I went and looked back at the Oakland start. I felt really good in that start with my arm angle," Oswalt said. "Yesterday, I was leaning back. I don't know why I was doing it but I was leaning a little bit outside. In Oakland, I was straight in line with the plate."