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Mack went 0-for-3 with a strikeout in Monday's loss to the Phillies.
Making his big-league debut and batting seventh, Mack was fanned by Aaron Nola in the fifth inning, between a groundout and a pop-up in foul territory. On the bright side, the rookie catcher guided Janson Junk to a strong outing in a 1-0 loss, and it's his defensive work rather than his bat that the Marlins are counting on to be an upgrade over Agustin Ramirez. While he'll split time behind the plate with Liam Hicks, Mack will get a long runway to establish himself at the top level after slashing .251/.336/.447 over 122 career games in Triple-A with 21 homers.
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Marlins' Robby Snelling: Option to take Paddack's spot
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Snelling is an option to start Friday's game against the Nationals, Christina De Nicola of MLB.com reports.
The Marlins have an opening in their rotation after designating Chris Paddack for assignment. Braxton Garrett could be first in line since he's already on the 40-man roster and Snelling is not. However, Snelling is certainly pitching well enough to get a look, having collected a 1.86 ERA and 44:15 K:BB over 29 innings covering six starts for Triple-A Jacksonville. Even if Snelling isn't the choice by the Marlins this time around, he should get his opportunity sooner rather than later.
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Marlins' Braxton Garrett: Could enter Miami rotation
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Garrett could be recalled from Triple-A Jacksonville to start Friday's game against the Nationals, Christina De Nicola of MLB.com reports.
He would fill the spot vacated by Chris Paddack, who was designated for assignment Tuesday. Garrett missed all of the 2025 season while recovering from UCL surgery and failed to make the Opening Day roster this spring, but he's responded with a 1.71 ERA and 26:12 K:BB over 26.1 innings covering five starts with Jacksonville. Robby Snelling is also an option to take Paddack's spot, but Garrett might have the edge since he's already on the 40-man roster.
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Marlins' William Kempner: Recalled from Triple-A
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The Marlins recalled Kempner from Triple-A Jacksonville on Tuesday, Christina De Nicola of MLB.com reports.
He's grabbing the roster spot vacated by Chris Paddack, who was designated for assignment. Kempner holds a 6.46 ERA this season with Jacksonville but has struck out a whopping 34 batters over 15.1 innings. He will be making his major-league debut when/if he enters a game.
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Marlins' Chris Paddack: DFA'd by Marlins
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The Marlins designated Paddack for assignment Tuesday, Ken Rosenthal of The Athletic reports.
Paddack was tagged for seven runs over 2.2 innings in his last start versus the Phillies, pushing his season ERA up to 7.63. His velocity was down across the board in that outing, prompting evaluations of his health. While it seems there isn't anything physically wrong with Paddack, the Marlins have nonetheless decided to move on from the righty. Braxton Garrett is the likeliest candidate to fill Paddack's rotation spot, though Robby Snelling should also receive consideration.
Junk (2-3) took the loss Monday against the Phillies, allowing one run on five hits while striking out six over 5.1 innings.
Junk delivered another strong outing but was saddled with the loss, as he allowed the only run of the night -- a Bryce Harper solo homer in the third inning. The right-hander filled the zone effectively, throwing 64 of his 92 pitches for strikes. He has been excellent of late, allowing just one run across his last 16.1 innings, and he's now gone at least five innings in six consecutive starts. Junk owns a 2.82 ERA and 1.04 WHIP so far, though his 27 strikeouts in 38.1 innings highlight a less appealing fantasy profile. He will look to continue his recent success in his next scheduled outing against Washington.
Marlins' Connor Norby: Exiting starting nine Monday
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Norby is out of the lineup for Monday's game against the Phillies.
Though he'll be taking a seat for Monday's series finale, Norby still appears to be ahead of Christopher Morel in the pecking order at first base. Since Morel was activated from the injured list last Monday, Norby started in five of the Marlins' ensuing seven games and went 5-for-18 with two doubles, three walks, two stolen bases and an RBI during that stretch.
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Marlins' Chris Paddack: Health being evaluated
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The Marlins will evaluate Paddack's health after the pitcher experienced a drop in velocity during Sunday's loss to the Phillies, Barry Jackson of the Miami Herald reports.
Paddack averaged just 91.3 mph with his four-seamer, which was down 1.5 mph from his yearly average. He was pummeled for seven runs on six hits and three walks in 2.2 innings and is now 0-5 with a 7.63 ERA and 1.66 WHIP through seven starts. Manager Clayton McCullough said shortly after the outing that Paddack would make his next scheduled start Friday against the Nationals. However, things would change if it's determined Paddack isn't 100 percent physically. If a change is made in the Miami rotation, Braxton Garrett (1.71 ERA, 26:12 K:BB in 26.1 innings at Triple-A Jacksonville) would be the likeliest replacement for Paddack, though Robby Snelling (1.86 ERA, 44:15 K:BB in 29 innings at Jacksonville) would also receive consideration.
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Marlins' Agustin Ramirez: Sent down to Triple-A
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The Marlins optioned Ramirez to Triple-A Jacksonville on Monday.
Ramirez has not done enough offensively to make up for his defensive shortcomings, slashing just .230/.318/.345 with two home runs. He will get a reset at Jacksonville while Liam Hicks and Joe Mack handle catching duties for the Marlins.
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Marlins' Joe Mack: Officially added to roster
Rotowire
The Marlins selected Mack's contract from Triple-A Jacksonville on Monday.
Mack earned his first big-league promotion after slashing .244/.388/.378 with three home runs and a 20:22 BB:K in his first 24 contests with Jacksonville. According to Christina De Nicola of MLB.com, Mack is in line to start in Monday's series finale versus the Phillies, and the 23-year-old should be in store for ample playing time while sharing reps at catcher with Liam Hicks. Mack is worth a pickup in two-catcher fantasy leagues where he's still available.
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Marlins' Owen Caissie: Deployed off bench Sunday
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Caissie went 1-for-2 after replacing Kyle Stowers in right field during Sunday's loss to the Phillies.
With the Marlins down 7-0, Caissie came off the bench to begin the sixth inning in order to give Stowers a bit of a rest. Caissie wasn't in the starting nine Saturday or Sunday due to a stomach bug, but he could be back in the lineup for the series finale Monday against right-hander Aaron Nola. Caissie is slashing .207/.248/.337 through his first 31 games for Miami with two homers and a brutal 42.6 percent strikeout rate.
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Marlins' Esteury Ruiz: Swats second homer
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Ruiz went 1-for-4 with a two-run home run in Sunday's loss to the Phillies.
The 27-year-old supplied all the Marlins' offense when he took a fading Jesus Luzardo deep in the seventh inning. It was Ruiz's second homer of the season, both of which have come in the his last three starts. He's also struck out six times in 12 plate appearances during those contests, however. Ruiz could push his way into a bigger role if he stays hot, but for now he's likely to see most of his action as a short-side platoon option, spelling any of Jakob Marsee, Kyle Stowers or Owen Caissie around the Marlins' outfield.
Marlins' Kevin Defrank: Out for foreseeable future
Rotowire
Defrank has no timetable for a return after suffering a right biceps injury, Christina De Nicola of MLB.com reports.
Defrank will not require surgery, so he's not necessarily out for the season, but he will be forced to miss substantial time. The 17-year-old was expected to pitch limited innings in the Florida Complex League this season, and it's unclear if he'll be able to pitch again in 2026.
Marlins' Chris Paddack: Losing ways continue Sunday
Rotowire
Paddack (0-5) took the loss Sunday against the Phillies, allowing seven runs on six hits and three walks in 2.2 innings. He struck out one.
The Phillies ambushed Paddack on Sunday, throttling the hurler for six runs in the opening frame. The right-hander remains with just one quality start in 2026, and he's been unable to get through five innings in his other six outings. Still winless on the season, Paddack won't be a recommended fantasy option when he takes a 7.63 ERA, 1.66 WHIP and 27:10 over 30.2 frames into his next scheduled outing versus the division-rival Nationals.
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Marlins' Agustin Ramirez: Heading to Triple-A
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The Marlins are expected to option Ramirez to Triple-A Jacksonville on Monday, Craig Mish of FanDuel Sports Network Florida reports.
Ramirez will head to Jacksonville after posting a disappointing .230/.318/.345 slash line with two home runs, 14 RBI, 14 runs scored and three stolen bases over 129 plate appearances in 31 contests with the Marlins this season. The 24-year-old hasn't shown improvement of late with a .200 average and 13 strikeouts over his last 14 games, so the Marlins appear ready to send him to Triple-A for a reset. In a corresponding move, the Marlins are expected to promote top catching prospect Joe Mack from Triple-A, and he could end up serving as Miami's primary catcher while Liam Hicks sees more starts at designated hitter and/or first base.
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