He was supposed to pitch against the Reds on Thursday, but that game was rained out. So he threw against a lineup that included Jorge Alfaro, Rock Shoulders and Travis Demeritte.
"You can't tell what Mother Nature is going to do," Detwiler said. "Anybody who can swing the bat is dangerous, so you've got to focus on what you can do. It's their time to shine. You look good and people are going to come look at you again. They are ready to swing so you have to stay focused."
Martinez, also pitching for the first time in seven days, had a little trouble staying focused, but allowed one run in 4 2/3 innings. He gave up a second-inning home run to Tomas Telis.
"I felt great and the pitches were there," Martinez said. "But I hadn't pitched in a game in awhile and mentally I wasn't sharp until the fourth or fifth innings. I made some mental mistakes. But I noticed it and was able to turn it around."
Martinez allowed just the one run on three hits. He walked one, struck out four and threw 69 pitches. Martinez has also allowed just one run in 4 2/3 innings in two Cactus League games entering Friday. In the competition for the fifth spot in the rotation, Martinez has acquitted himself well to this point.
"I feel confident in how I am pitching," Martinez said. "Wherever they send me, I'll be all right. I will be good wherever I go. I'm not trying to worry about who is going to take what spot. That only hurts me."
• Ross Ohlendorf, sidelined with tightness in his right groin muscle, is scheduled to throw a bullpen on Saturday.
• Tanner Scheppers, who has been sidelined with a sprained right ankle, will make his first Cactus League appearance on Saturday against the Brewers.
• Yu Darvish, who had Tommy John surgery on Tuesday, rejoined the Rangers on Friday. Said assistant general manager Thad Levine, "He is in good spirits. He is taking the process as seriously as he does his profession. The goal is to get on the mound as soon as he can and never have this type of injury again."
T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, and follow him on Twitter @Sullivan_Ranger. This story was not subject to the approval of Major League Baseball or its clubs.