Fiers, who filled in admirably in the Brewers' rotation for Marco Estrada earlier in the season and now Shaun Marcum, has given up just one run in his last three starts.
"I've always thought I could pitch at this level and this good," Fiers said. "I think I should actually be better this year, but I had a couple of rough ones early on. I'm fine, I'm going to keep working hard and try to do the same the next start."
That next start will be in Thursday afternoon's series finale against the Marlins, as the Brewers attempt to bounce back from Wednesday's extra-inning loss and try seal the series win at Miller Park.
While the Brewers will send a rookie to the mound, the Marlins' most veteran starter, Mark Buehrle, will toe the rubber for his final start before the All-Star break.
At 7-8 with a 3.48 ERA, Buehrle said his first half has been "record-wise, terrible" and he would like to notch some more wins. Following back-to-back seven-inning efforts that resulted in victories, the lefty has a chance to win his third start in a row as the Marlins try to escape Milwaukee with a series split. But the veteran knows it will require a total team effort.
"It takes everything," Buehrle said. "You need run support, you can't give up many runs. The bullpen has to hold a lead. ... I think it's just everything. Go deep into games. The longer you're out there, the better chance to win more games."
Marlins: Stanton to miss finale; Derby status in air
Right fielder Giancarlo Stanton missed his second straight start on Wednesday due to soreness in his right knee. An MRI exam on the slugger's knee revealed "loose bodies," and Stanton is day to day for now.
The slugger is hopeful to return to the Marlins' lineup Friday in St. Louis, but if he can't, chances are he will be held out of the Home Run Derby and All-Star Game next week.
The Marlins acquired Carlos Lee and cash considerations from Houston in exchange for Minor League infielder Matt Dominguez and pitcher Rob Rasmussen.
Brewers: K-Rod still trying to get on track
Reliever Francisco Rodriguez has had the worst season of his Major League career by nearly every statistical measure. Following Wednesday's game, when he pitched one scoreless inning of relief, walking one and striking out one, the right-hander has a 4.08 ERA and a 1.51 WHIP.
"The inconsistency on my release point has been pretty much miserable," Rodriguez said. "I'm not able to spot or command my pitches when I want to and need to. I'm really frustrated by that. But the ball is coming out of my hand pretty good -- if I want to reach back, I can reach back and I know it's there, but that makes no sense when you're all over the place.
"But you know what? I'm a warrior, and nothing is going to stop me. Confidence is still there. I just have to keep fighting."
Wednesday's win for the Marlins snapped a 10-game losing streak to the Brewers, and a six-game skid at Miller Park.