Marlins Minor League Report: Joe Mack promoted to AAA, Robby Snelling should be next

[Kevin Barral]

Fam system updates from the week of April 21, including several notable promotions and offensive players living up to the hype.

Fish On First is publishing weekly Miami Marlins minor league summaries throughout the 2025 season, covering the progress of FOF Top 30 prospects and lesser-known players in the organization who are worth monitoring. Each full-season MiLB affiliate has its own section below.

Player stats are up to date entering April 28.

 

Triple-A Jacksonville

The Miami Marlins recalled Agustín Ramírez to the Major Leagues, which directly led to Joe Mack being promoted from Pensacola to AAA-Jacksonville. In just five games with the Jumbo Shrimp, Mack is slashing .368/.478/.579/1.057 with one home run and one RBI. Combining both levels, Mack is slashing .333/.468/.603/1.072 with four home runs and six RBI. He already showed a plus power tool during his 2024 breakout season, but he continues to improve as an all-around hitter.

Defensively, Mack has caught eight baserunners stealing and only has three passed balls.

If Mack keeps playing like this, he could potentially join Ramírez in the majors by the end of the season.

FOF's #7 prospect, Deyvison De Los Santos, is being more selective at the plate compared to last season. He is slashing .290/.356/.419/775 with two home runs, 14 RBI and a 117 wRC+. The biggest downside with De Los Santos is his career-worst 30.8% strikeout rate.

De Los Santos' second home run of the season came in walk-off fashion on Sunday. The ball left the bat at 110.7 mph.

One name that has quietly impressed is infielder Jack Winkler. Acquired in the minor league phase of the Rule 5 Draft from the Athletics, Winkler is slashing .333/.370/.510/.880 with two home runs, six RBI and a 143 wRC+. He can play both middle infield spots and third base as well as first base if necessary.

Outfielder Andrew Pintar is slashing .290/.338/.319/.657 with four RBI. Although that looks decent on the surface, he has yet to hit a home run while striking out 41.3% of the time. He has been relying on a .526 BABIP, which will drop significantly over time.

Jacob Berry has continued his tradition of slow starts. Through 22 games, he's slashing .119/.241/.209/.450 with one home run and nine RBI with the lowest batting average among all qualified Triple-A hitters. Defensively, he made all of his appearances last week at second base.

This may be the final time Adam Mazur is mentioned in this weekly recap for a bit. The Marlins sent Connor Gillispie to AAA on Sunday and Mazur could start in that spot during the upcoming homestand. Through five appearances (four starts), Mazur has posted a 1.44 ERA, 3.45 FIP, 8.64 K/9 and 1.08 BB/9 through 25 innings pitched.

 

Double-A Pensacola

Kemp Alderman continues to rake, slashing .290/.354/.539/.891 with four home runs, 14 RBI and a 157 wRC+. The most impressive improvement has been the career-low strikeout % of 20.3%. The road to his 20/20 season is still going well, having stolen seven bases thus far.

It's as simple as this: Robby Snelling should be in AAA. Through four starts, he's posted a 1.61 ERA, 2.18 FIP, 11.69 K/9 and 1.21 BB/9 through 22 ⅓ innings pitched. His fastball velocity has bounced back to where it had been earlier in his pro career and he is pairing it with sharp command.

Dax Fulton missed his last start, but it was precautionary and not injury-related. He is expected to make his next start on time. Through three starts, he's posted a 3.46 ERA, 4.45 FIP, 8.31 K/9 and 5.54 BB/9 through 13 innings pitched.

Once regarded as a Marlins Top 30 prospect, 24-year old Evan Fitterer is off to an amazing start. In four appearances (three starts), he has a 0.87 ERA, 2.01 FIP, 8.71 K/9 and 2.18 BB/9. This is his lowest walk rate since 2021. There is extra pressure on Fitterer this season because he is due to become a minor league free agent unless he earns a spot on Miami's 40-man roster.

In six appearances, Josh Ekness has yet to allow an earned run. He has a 0.00 ERA, 1.31 FIP, 15.95 K/9 and 3.68 BB/9 through 7 ⅓ innings pitched. He also has two saves.

Through 16 ⅓ innings, Adam Laskey has a 0.55 ERA, 1.01 ERA, 11.57 K/9 and 0.55 BB/9. These are all easily career-highs for the 27-year-old. With such a packed pitching staff in AAA, Laskey has been relegated to AA, but at some point should be an option for the Marlins in long relief or even as a spot starter.

 

High-A Beloit

Catcher Ryan Ignoffo is off to another great start this season, slashing .232/.308/.478/.786 with three home runs, 19 RBI and a 117 wRC+. No other player on the Sky Carp has driven in more than seven runs. On the defensive side, he's got four passed balls, but has thrown out seven baserunners. A promotion to AA is possible by the middle of the season.

Another catcher who is off to an awesome start in a VERY limited sample size is 2024 12th-round pick Connor Caskenette. He's slashing .368/.571/.421/.992 with five RBI. At 22 years old, he can get more consistent reps at catcher if they promote Ignoffo.

Top prospect Thomas White is coming off his longest career start, going 5 ⅓ innings, striking out seven and allowing one run on one hit. For the season, he has a 3.31 ERA, 3.03 FIP, 12.12 K/9 and 6.06 BB/9 through 16 ⅓ innings pitched.

Noble Meyer, who was drafted ahead of White in that 2023 class, is off to an uneven start. He's posted a 5.11 ERA, 5.55 FIP, 8.03 K/9 and 4.38 BB/9 through 12 ⅓ innings pitched. Meyer is still struggling to throw strikes and it has been a constant issue throughout his career.

Up until Sunday, Xavier Meachem had not allowed an earned run. He had been a bit lucky, to be honest, posting a 4.87 FIP and 8.10 BB/9. Meachem began coming back down to earth in his latest outing with two earned runs allowed, but he's been impressive overall.

 

Low-A Jupiter

There was a veteran presence around the Hammerheads during their previous series. Ryan Weathers, Eury Pérez and Victor Mesa Jr. all began rehab assignments.

The youngest prospect to appear in a Minor League Baseball game so far in 2025, Andrew Salas continues to find success in Jupiter, slashing .275/.473/.350/.823 with two RBI, five stolen bases and 154 wRC+. After a slow start, assuming he may look overmatched, he may stick around Low-A for the rest of the season.

On the other hand, Carter Johnson, the Marlins second round pick last year is off to a rough start, slashing .177/.258/.253/.511 with 31 strikeouts. It is very likely that once the FCL season begins, he will go down a level to see if he can get into a rhythm.

PJ Morlando made his season debut and through four games, he is 2-for-16 with one home run, nine strikeouts and one walk. He has played in center field and left field so far.

Starlyn Caba was placed on the 7-day injured last after suffering a left thumb sprain, per our own Isaac Azout. He was slashing .200/.431/.200/.631 with three RBI, six stolen bases and a 116 wRC+ prior to the injury. He had been splitting time between shortstop and second base.

Abrahan Ramírez, who was one of three players acquired in the Jazz Chisholm Jr. trade, is off to a nice start, slashing .245/.406/.347/.753 with 13 RBI and a 128 wRC+. He's been primarily at third base and DH.

 

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Next Up (April 29-May 4)

• Triple-A Jacksonville at Durham
• Double-A Pensacola at Birmingham
• High-A Beloit at Peoria
• Low-A Jupiter at Fort Myers

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[Slacker Mills]

Joe Mack should have joined the Marlins instead of Brantley. Absolutely no reason to wait on him. He's facing better pitching at AA than he would in AAA.

Mazur and Snelling should have started the season in the rotation ahead of Quantrill and Gillaspie. The Marlins would have at least a .500 record right now.

Fitterer and Laskey should also replace a couple bullpen guys and be used for four-inning relief stints. That's the right way to protect the pen.

[Slacker Mills]

July rotation: Perez, Weathers, Alcantara, Snelling, Mazur, Meyer, Fitterer and Laskey. Starters go five with a goal of using one of the others for three or four innings to follow.

Adios, Edward.

[Guest]

I'm going to keep asking this question until someone gives me an answer.  Supposedly you Fish Stripes guys are insiders, right? I wish SOMEBODY would ask McCullough why he REFUSES TO PLAY THE INFIELD AT DOUBLE PLAY DEPTH with Runners at First and Third or bases loaded and less than 2 outs.  He makes crazy moves that have everyone wondering WTF he's thinking, even the TV guys who have to be very careful not to criticize the genius manager. There have been a lot of strange moves, but REFUSING TO PLAY THE INFIELD AT DOUBLE PLAY DEPTH might be the craziest one. It has cost us several runs.