It may be too early to bring it up, but what the heck. Halfway to the All-Star Game, Diamondbacks left-hander Patrick Corbin is as good a candidate as any to start for the National League. He has been that good.

“That’s a no-brainer,” catcher Miguel Montero said of an All-Star invitation.

“He’s going to go. I know it is still a long way to go, but he’s getting better.”

It has been a remarkable eight weeks for a Corbin, who entered spring training in a three-way fight for the fifth spot in the starting rotation and has emerged as the staff stopper. He's had victories to stop four- and three-game losing streaks, the D-backs' longest two losing streaks of the year.

Corbin will bring a 7-0 record and a 1.44 ERA into his 10th start of the season Sunday against the Padres, and only perennial Cy Young Award candidate Clayton Kershaw of the Dodgers has a better ERA in the majors.

The D-backs have won all nine of Corbin’s starts, and he is the only pitcher in either league to have gone six or more innings and given up two or fewer runs in all nine of his outings. Ubaldo Jimenez was the last to do that, when he opened the season with 12 straight such starts in 2010.

His maturity level has been evident from the clubhouse to the mound in Yankee Stadium, when he pitched like the other No. 46 -- the Yankees’ Andy Pettitte -- in front of family and friends, giving up two hits and one run in seven innings on April 18. He left with a lead that the bullpen did not hold; he would be 9-0 if the 'pen had held leads in New York and San Francisco in successive April starts.

“The thing that Patrick has done well this year is stay out of the middle of the plate,” D-backs manager Kirk Gibson said. "When he makes a mistake, he misses way off the corner either way, either inside or outside. He’s throwing to all the quadrants, too, so it’s not like you can sit there and look for one spot."

Corbin, 23, cannot get much better than he was last Monday, when he threw his first complete game in a 5-1 victory at Coors Field. The Rockies had bad swing after bad swing on sliders in the dirt, and afterward Todd Helton called Corbin's the best slider he has ever seen.

That performance came a start after Chipper Jones tweeted, “This Corbin dude is pretty nasty!” when Corbin threw seven shutout innings in a 2-0 victory over the Braves on May 14.

Corbin threw a disproportionate amount of sliders against Colorado, between 25 and 30, not only because the pitch was working so well but because he threw so many strikes with his fastball that hitters had to look there first. Perhaps the main reason for Corbin’s success is his ability to locate his low-90s fastball on both corners and at all levels.