PHOENIX -- There is no indecision when Wade Miley is on the mound.
The D-backs left-hander gets a sign from his catcher and throws the pitch, no questions or headshaking involved.
That approach has led to big success this year for the southpaw, and he bolstered his case for National League Rookie of the Year honors with eight shutout innings to help the D-backs beat the Marlins, 3-0, and sweep a day-night doubleheader Wednesday night at Chase Field.
In the first game, the D-backs prevailed, 3-2, behind Tyler Skaggs, who was making his Major League debut.
"He just trusts you and he goes with whatever you put [down]," catcher Wil Nieves said of Miley. "He just concentrates on hitting the spots. When you have a guy like that on the mound, pretty much he's going to be successful because there's no second-guessing and no worrying on if it's the right or wrong pitch. He just throws it with conviction and it's fun catching him. Our tempo was really good. Even the hitters were calling timeout sometimes because we were on the same page and going quick. When you have a pitcher like that, hitters feel uncomfortable and rushed."
Hitting against him, well, that's a different story.
Miley (14-8) allowed just four hits and fanned five to lower his ERA to 2.80, fourth best in the NL. Miley's win total is the most by an NL rookie since Jeff Francis won 14 in 2005.
"He's a strike thrower," Marlins manager Ozzie Guillen said. "A lot of strikes. This kid, he's got good stuff. He's got a lot of confidence. I love the way they handle him."
Miley, who matched his career high with 116 pitches, finished his outing on a high note when he struck out the side in the eighth.
"It's that time," Miley said. "We've got 38 games left and we've got to strap it on and play and we can't let games slip away right here right now."
That's exactly what the D-backs did Tuesday night as they scored five runs against the Marlins in the first inning, only to wind up losing, 6-5, in 10 innings. It was one of the few times this season that manager Kirk Gibson admitted he was upset with his players.
"It was disappointing last night," Gibson said. "That's the most disappointed I've been all year. It hurt. You go home and regroup."
Gibson did not sleep much Tuesday night, but was heartened by what he saw when he walked around the clubhouse Wednesday morning.
"They came in and were mentally prepared to do what we had to do today, and they did it," Gibson said. "They executed it well."
The D-backs gave Miley an early lead to work with thanks to Paul Goldschmidt's RBI single in the first inning off Wade LeBlanc.
A pair of passed balls by Marlins catcher Rob Brantly helped the D-backs score a pair of runs in the fourth to take a 3-0 lead.
"[Miley] and LeBlanc really were throwing the same type of game," Gibson said. "We were fortunate to get some runs."
Indeed, Goldschmidt's RBI single in the first was not hard hit and another run scored on a passed ball and the other on a bloop single by Chris Johnson.
"Unfortunately, he was the better Wade tonight," LeBlanc said. "It was a grind, similar to Colorado. Not as many dinkers and dorkers. But they found holes when they needed to and put up enough runs."
Miley's only real jam of the night came when the Marlins opened the seventh inning with back-to-back singles. Miley, though, was able to retire the next three hitters to end the frame.
"It's time to bear down," Miley said of what went through his mind after the leadoff hits. "You've got to get out of this."