The Marlins optioned Mazur from Triple-A Jacksonville on Monday.
Mazur will give up his spot on the 28-man active roster and in the rotation to Edward Cabrera (elbow), who is slated to start Tuesday's game against the Phillies after being reinstated from the 15-day injured list. After being recalled from Jacksonville on Aug. 28, Mazur went 0-3 with a 4.44 ERA, 1.48 WHIP and 14:8 K:BB in 24.1 innings across five starts.
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Marlins' Adam Mazur: Serviceable results in no-decision
Rotowire
Mazur didn't factor into the decision Saturday against the Rangers, allowing two runs on five hits and two walks in four innings. He struck out two.
Mazur delivered a decent outing, giving up no extra-base hits, but he was lifted after throwing just 63 pitches. The right-hander has been shaky overall in 2025, posting just one quality start through his six outings. With a 4.80 ERA, 1.50 WHIP and 19:12 K:BB across 30 innings, Mazur will be tough to recommend as a streaming option in the vast majority of fantasy leagues against a formidable Mets lineup next weekend.
Mazur (0-4) allowed two unearned runs on one hit and two walks over six innings Sunday, striking out four and taking a loss against Detroit.
Mazur coughed up a pair of runs in the second inning due to two errors by his defense. He then retired 13 of the last 14 batters he faced to deliver his first quality start of the year. He had given up at least four runs in three of his last four starts, but he dropped his season ERA from 6.30 to 4.85 after Sunday's performance. Mazur has posted a 17:10 K:BB through 26 innings and has yet to strike out more than five batters in an outing. He's currently lined up for a road matchup with the Rangers next weekend.
Mazur (0-3) yielded six runs (four earned) on eight hits and three walks over 4.1 innings Tuesday, striking out one and taking a loss against Washington.
Mazur was greeted with a three-run shot by Josh Bell in the first inning. The Marlins then plated a pair of unearned runs in the fourth before Daylen Lile belted a solo homer in the fifth. Mazur had allowed two home runs through three starts at the MLB level this year before Tuesday's poor performance. He's now sporting a 6.30 ERA with a 13:8 K:BB across 20 MLB innings. Mazur is currently projected to face the Tigers at home this weekend, though it's unclear if he'll get another turn in the rotation.
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Marlins' Adam Mazur: Drawing start Tuesday
Rotowire
Mazur is slated to start Tuesday's game against the Nationals in Miami.
Mazur had initially been lined up to start this past Sunday's series finale versus the Phillies, but Miami ended up going with an impromptu bullpen game led off by right-hander Tyler Phillips. Since the Marlins were able to stay away from Mazur in relief that day, he'll end up taking the hill for Tuesday's contest. Through his first three starts with Miami this season, Mazur has gone 0-2 with a 5.74 ERA, 1.53 WHIP and 12:5 K:BB in 15.2 innings.
Marlins' Adam Mazur: Expected to follow opener Sunday
Rotowire
Mazur is expected to work as a bulk reliever behind opening pitcher Tyler Phillips during Sunday's game against the Phillies, Daniel Alvarez-Montes of ElExtraBase.com reports.
Mazur had made a pair of starts for the Marlins upon being recalled from Triple-A Jacksonville on Aug. 28, but Miami appears set to use the right-hander behind an opener with the hope of generating better results from him. Over his three total starts with Miami this season, Mazur has gone 0-2 with a 5.74 ERA, 1.53 WHIP and 12:5 K:BB in 15.2 innings.
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Marlins' Adam Mazur: Allows 10 hits in loss
Rotowire
Mazur (0-2) took the loss Tuesday against the Nationals, allowing five runs (four earned) on 10 hits and no walks while striking out five in six innings.
Mazur set a career-worst mark with 10 hits allowed, and five of the 10 hits went for extra bases. The biggest hit of the night against him was a two-run blast in the fourth by James Wood. Mazur was able to finish strong with two scoreless frames and tied his career high with six innings. He's tentatively lined up to complete a two-start week with a tough matchup against the Phillies.
Mazur is listed as the Marlins' probable starting pitcher for Tuesday's game in Washington, Kevin Barral of FishonFirst.com reports.
Mazur will draw a second turn through the rotation after he took a no-decision against the Mets on Thursday following his promotion from Triple-A Jacksonville. In that start, Mazur struck out two batters while allowing two earned runs on four hits and one walk. The upcoming start against the Nationals represents a more favorable matchup than the one with the Mets, but Mazur's lack of a track record of success in the majors coupled with his so-so numbers for Jacksonville this season (4.36 ERA, 1.30 WHIP and 100:30 K:BB in 107.1 innings) make him difficult to rely upon as a streaming option.
Mazur allowed two runs on four hits and a walk while striking out two over four innings in a no-decision versus the Mets on Thursday.
Mazur threw 39 of 60 pitches for strikes in this outing. He started off shaky, allowing a two-run double to Brandon Nimmo in the first inning, but Mazur was able to settle in after that. The 24-year-old has given up six runs across 9.2 innings while adding a 7:5 K:BB through two starts in the majors this year, while his 4.36 ERA, 1.30 WHIP and 100:30 K:BB through 107.1 innings at Triple-A Jacksonville are just passable marks. Should the right-hander get another turn through the rotation, he is tentatively lined up for a road start against the Nationals next week.
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