This was certainly not what he was expecting. Making his first Major League start since July 13, 2013, Detwiler ended up setting a personal record for most runs given up in a game. Detwiler allowed eight in 4 1/3 innings in the Rangers' 10-0 loss to the Athletics at the Coliseum.
Detwiler had previously allowed seven runs in four of his first 69 starts, all with the Nationals before being traded to the Rangers this winter. Three of Detwiler's eight runs were unearned on a night when the Rangers committed four errors.
"He lost command of the fastball in," Rangers manager Jeff Banister said. "That set the ball rolling. He had command of his fastball away, but his breaking ball wasn't in the strike zone as much as he wanted."
Detwiler started out well, retiring the first five hitters he faced. Then with two outs in the second, Brett Lawrie doubled to deep right-center, only to get thrown out at third on a strong relay by shortstop Elvis Andrus.
That was the defensive highlight of the night for the Rangers and a warning of what was to come for Detwiler. He started the third by getting Josh Phegley on a fly to center before Marcus Semien singled and scored on a triple by Tyler Ladendorf.
"I don't think I really had command of the inside the entire game," Detwiler said. "It kind of allows them to dive out there and really protect the outside. If that's the only way I'm throwing strikes, then that's going to play right into their hand.
"It was one time through the lineup, and they realized that I wasn't throwing any strikes in, so they took it out of their mind."
Detwiler then hit Craig Gentry with a pitch, and Cody Ross followed with a line drive through the left side to bring home a second run. After Ben Zobrist popped out trying to bunt, Detwiler walked Billy Butler to load the bases.
That brought up first baseman Mark Canha, a Rule 5 Draft pick making his first Major League start. In his second at-bat, Canha hit one off the top of the wall in right-center that brought home three runs.
"That was the ballgame right there," Banister said.
Errors by Andrus and third baseman Adam Rosales, and a passed ball by catcher Robinson Chirinos led to an unearned run in the fourth. Detwiler's night ended when he allowed four straight one-out singles in the fifth.
"I am proud that he continued to compete and continued to battle," Banister said. "This will be a learning experience for him. I expect his next outing to be better."