Fiers was very impressive again Tuesday night as he took a perfect game into the seventh inning and led the Brewers to a 3-1 victory over the Cincinnati Reds.
The only other hits Fiers gave up were eighth-inning singles to Xavier Paul and Ryan Hanigan. The right-hander struck out pinch-hitter Ryan Ludwick to get out of the inning and left the field to a standing ovation.
"He pitched an outstanding ball game," Roenicke said. "Absolutely, he has to be put in that conversation (for Rookie of the Year). He's been baffling hitters. And not just average hitters, he's been doing it against some very strong lineups."
Fiers said he was aware he was throwing a no-hitter, but stayed focus as his team was only leading by two runs at the time.
"Every start I go out there I don't want to give up a hit, but when it got into the sixth and seventh inning, thoughts came into my mind even more," he said. "I'm just trying to put zeroes on the board, no matter if they get 10 hits or zero hits. I just tried to keep my cool and not think about it."
Fiers said he thought he threw a good pitch to Cozart, but the Reds shortstop went out and got the pitch.
"He got the barrel on it and he hit it in a good spot," he said. "I felt great out there."
Fiers has been terrific since he was called up from Triple-A Nashville on May 29. He hasn't allowed more than two runs in any of his last nine starts, going 5-2 with a 1.03 ERA and racking up 61 strikeouts in 61 innings.
Roenicke said it was time for everyone to realize that Fiers could pitch in the major leagues.
"I think he's shown he can pitch," he said. "He's a battler. He baffles guys with all the different stuff he throws."
Jim Henderson pitched a scoreless ninth for his first career save. It was Milwaukee's second consecutive win over the NL Central leaders and its fifth straight victory at home.
The Reds have lost three straight for the first time since July 2-5. They remained 3 1-2 games ahead of second-place Pittsburgh.
Reds manager Dusty Baker said the problem for Cincinnati was Fiers.
"That's one of the best games pitched against us in a long time," Baker said. "There's not a lot we could do. He's very deceptive with that Tim Lincecum-like delivery."
Johnny Cueto (14-6) pitched seven innings for the Reds, giving up three runs and six hits while striking out nine. He was trying to become the first NL pitcher to reach 15 wins this season.
The Brewers grabbed a 2-0 lead in the first inning on Aramis Ramirez's 15th home run, a 425-foot shot to the Milwaukee bullpen in left-center. It was the second consecutive game in which Ramirez homered against the Reds.
Jean Segura's RBI groundout in the seventh increased the lead to 3-1. It was Segura's first career RBI.
Baker said 1B Joey Votto would not be activated from the DL on the team's current seven-game road trip, which ends Sunday in Chicago. Votto had arthroscopic surgery on his left knee on July 17. ... Brewers RHP Shaun Marcum, on the DL since June 15 with right elbow tightness, will make a rehabilitation start Thursday with Class-A Wisconsin. ... The series concludes Wednesday when the Reds send Mat Latos (10-3) to the mound against Randy Wolf (3-8).