PHOENIX -- D-backs manager Chip Hale predicted a strong outing from starter Patrick Corbin prior to Wednesday's 10-4 loss to the Blue Jays.
That certainly didn't happen as forecast. Instead, Corbin made some costly mistakes against a challenging Toronto lineup, allowing six runs (five earned) on nine hits in 5 2/3 innings. It was the fifth consecutive start for the Arizona left-hander in which he allowed five or more runs.
"I've looked at video a bunch, and I don't see anything mechanically," Corbin said. "Just the results aren't there, and I'm trying to get better and work on things in between starts, and hopefully I can figure something out."
Corbin owned a 3.99 ERA following his outing on May 20. In 11 starts since then, he has a 6.71 ERA, raising his season ERA to 5.38, the highest it has been all season.
The left-hander is winless in his last five starts. He was expected to be the D-backs' No. 3 starter this season after he pitched well in the second half last year following his recovery from Tommy John surgery.
Corbin has struggled, particularly of late, and has been attempting to correct his mistakes. Prior to this start, he didn't throw his typically scheduled bullpen session, something he believed did help him against the Blue Jays after settling in.
"Where we are in the season, I'm just going to try to do that, just try to save some bullets," Corbin said. "After the first inning, I worked ahead a lot better, so it's just something I'm going to continue to try to do."

Corbin allowed a leadoff single to Darwin Barney, followed by a two-run homer to Josh Donaldson. He allowed an unearned run in the second on a sacrifice fly by Barney, then retired six of the seven batters he faced in the third and fourth.
But in the fifth, Corbin gave up an RBI double to Troy Tulowitzki and an RBI single to Kevin Pillar. He allowed an RBI double to Donaldson, his last batter of the day.
Even though the results weren't there again for Corbin -- who is 0-7 with a 7.23 ERA in 10 starts at home this season -- Hale said he saw some encouraging improvements outside of a few mistake pitches to formidable Blue Jays sluggers.
"Second, third and fourth innings, [he] really got ahead in the count. If you look at his numbers, he threw a lot of first-pitch strikes and controlled the zone really well, and I thought he pitched well," Hale said. "Then again, [he] started to get behind, and these guys are just not hitters you can get behind. They can narrow their pitch selection. If you look at where the balls were on the plate, it's just too center cut for them."