Fish On First Prospects Report: Alderman, Ignoffo, Compton catch fire; take notice of Julio Mendez

For the 2026 season, Fish On First will provide weekly reports on the Miami Marlins farm system, covering all levels. Here's the final April edition of our Fish On First Prospects Report, which as always includes several important injury updates near the bottom of the page.

This report covers the games played from April 21-26.

Triple-A Jacksonville

Recently ranked as Fish On First's No. 8 prospect, Kemp Alderman finished the week with nine hits, capping off the week with a grand slam on Sunday, marking his fourth home run of the season. After a slow start to the season, Alderman is now slashing .253/.354/.458/.812 with four home runs and 10 RBI. The only downside for Alderman has been his 35.2% strikeout rate, which is the highest of his minor league career thus far.

Jared Serna finished the week with five hits and drove in five runs. He is now slashing .243/.312/.314/.626 with one home run and seven RBI. He has also stolen five bases, which is second-most on the team. Serna was one of three players acquired in the Jazz Chisholm Jr. trade back in 2024, and after a strong start to his organizational tenure, he has struggled, particularly in the slugging department.

An under-the-radar name on the pitching side has been Zach Brzykcy. The 26-year-old reliever was claimed off waivers from the Washington Nationals. No longer occupying a 40-man roster spot, he has a 0.84 ERA with 11 strikeouts in eight appearances. On Sunday, his fastball averaged 94.5 mph and he closed out a Jumbo Shrimp win with a strikeout on his curveball. Brzykcy has MLB experience in each of the past two seasons and he's setting himself up for a return soon.

Another righty, Jack Ralston, impressed during spring training, and he continues to succeed with the Jumbo Shrimp. In nine games, he has a 1.46 ERA, 1.68 FIP, 15.32 K/9 and 5.11 BB/9. He possesses similar mid-90 fastball velocity, but his splitter is his biggest weapon—18 of his 21 total strikeouts have come on that pitch. Ralston has yet to make his big league debut.

This past week, Josh Ekness, who is now Fish On First's No. 20 prospect, surrendered three runs in one outing, then he allowed two more on the day of this article's publication. His season ERA has ballooned to 4.38.

Double-A Pensacola

It was a busy week for the Wahoos, who played seven games in six days against the Biscuits, including one game that was made up from a previous rain out. Pensacola got the better of Montgomery during the week, taking foir of the contests despite losing the run differential battle by one. Despite being thin in the pitching department,

After a bit of a slow start with the stick, Ryan Ignoffo found it during this series. In four games against Montgomery, he went 7-for-16 with a home run, two doubles, and two RBI. In the first game of the seven-inning doubleheader on Thursday, he came within a triple of the cycle.

A 20th-rounder from 2023 who only converted to catcher after turning pro, Ignoffo spent most of the offseason and spring training honing in on his defense, particularly with blocking and framing. Those exports have shown up well for Ignoffo so far as he’s allowed just one passed ball in 110 innings. He also owns a strong arm, contributing to his 32% caught-stealing rate last year. He is off to a 25 CS% start this season.

Drafted as a two-way player, Ignoffo came out of the draft with catcher being one of few positions he had never played. The Marlins challenged him with it and he continues to improve with age. Offensively, Ignoffo has a good feel for the barrel, keeping CSW%s in check year over year, including 24.6% so far on the young campaign. His ability to at least fight strikes off limits his strikeout rates and he’s got some good gap-to-gap pop which allotted him 20-plus doubles in both 2024 and 2025. Ignoffo has seen his walk rates shrink a bit as he’s matriculated to the upper minors, but overall, he’s been an above average hitter at the Double-A level; he has a 106 wRC+ on the young season. A good athlete with a sneaky-good bat, Ignoffo should take over as the primary catcher once Joe Mack is called up. On current track, he should be able to stick as an at least serviceable backstop with potential positional flexibility to fill in at the corner infield or corner outfield spots.

Karson Milbrandt keeps rolling. His latest exports this week were six innings worth of one run ball on six two hits and six strikeouts. His only run came on a home run. In his first four starts, Milbrandt owns a minimal 1.96 ERA, which ranks third-best in the Southern League. His 23 strikeouts are fourth-most on the circuit.

Karson Milbrandt was filthy for Double-A @BlueWahoosBBall 🐟

6 IP | 1 ER | 2 H | 1 BB | 6 K

The @Marlins’ No. 9 prospect generates 18 whiffs and owns a 1.96 ERA this season. pic.twitter.com/pEJn6FQxlu

— MLB Pipeline (@MLBPipeline) April 26, 2026

Maintaining control and command particularly deeper in starts will continue to be Milbrandt’s MO as he rounds out his development and attempts to realize a mid-rotation ceiling. Because of the command dipping later in his outings and due to his just-average size, there is some reliever risk, but with great raw stuff and improving fastball velocity, he should have no problem finding the middle ground of that equation.

High-A Beloit

It was a very rough week for the Sky Carp who dropped four of six games in their series against Great Lakes, only taking the first and last games. Run scoring wasn’t an issue for Beloit who plated over six runs a game and 40 total including at least nine in three of the contests, but their pitching continued to struggle. The team now owns a 6.57 ERA, third-highest in the Midwest League. They now lead the circuit in walks with 136.

It was a solid series at the plate for Cam Clayton who went 3-for-12 with a home run, seven RBI, and six walks while striking out three times. A 14th-round pick from 2024, Clayton spent 2025 mostly at Low-A where he slashed .242/.356/.390 with a 48/36 K/BB. The solid on-base numbers have followed him to Beloit this year where he is currently slashing .188/.480/.344. Clayton was drafted as a shortstop, but he quickly made the move off of the position as a pro. He’s spent time as a third baseman, but just-average arm strength befits him best for first base where he has played 88 ⅓ innings. 

Clayton, 6’1”, 205, isn’t built for much power, but as long as he is seeing pitching as well as he historically has as he continues to rise through the minor league ranks, he provides intrigue. He’s also a crafty baserunner, having stolen nine bases already this season. If Clayton can improve contact rates, he will be a pesky bat off the bench at the next level.

Another offensive catalyst this series was the 2025 second-round pick, who was hitting everything in sight. On the series, Brandon Compton went 8-for-14 with two homers and five RBI. Arguably most impressive of all is the rate at which Compton walked. In these six games, he took a whopping 11 free passes while striking out just six times.

Like Clayton, the ability to see pitching extremely well will give him a decent floor, but his defensive inflexibility could limit his ceiling. What will drive Compton’s future will depend on how much he can tap into solid raw strength while not straying too far from his patient roots. If he can become a consistent power threat while continuing to walk, he has a starter’s ceiling. Keep a close eye on his power numbers as he continues to develop and climb through the levels. Upper minors pitching will be a good measuring stick for the lefty Compton. That promotion could happen later this season, especially if he continues to build on his 170 wRC+.

Low-A Jupiter

A 21-year-old left-handed pitcher, Julio Mendez was named our FOF Minor League Player of the Week after striking out 11 through five innings of work in his most recent start. His fastball topped out at 95.2 mph and averaged 93.1 mph. Mendez's performance has been phenomenal dating back to the 2025 All-Star break, allowing a total of nine earned runs over those 11 starts.

Andrés Valor had been ice cold at the plate until this past series. The athletic outfielder slashed .250/.464/.400 with three steals, including three batted balls with an exit velocity of at least 105 mph. Maintaining that throughout the month of May could earn Valor a ticket to Beloit considering he already has a full year of Low-A experience under his belt.

Injuries/Rehab

Following Christopher Morel's return to the Marlins active roster, there are no longer any injured big leaguers currently on rehab assignments.

It looked as though Jacksonville's Jacob Berry had suffered a significant injury when he exited Friday's game early. Fortunately, he returned to the lineup on the day of this report.

Aiva Arquette (core muscle surgery) is scheduled to make his 2026 season debut during this upcoming week.

For complete Marlins MiLB injury updates, bookmark this page.

This week's MiLB schedule

• Triple-A Jacksonville at Durham
• Double-A Pensacola vs. Biloxi
• High-A Beloit at Lake County
• Low-A Jupiter at Dunedin

Interested in learning more about the Miami Marlins' top prospects? Check out our comprehensive top prospects list that includes up-to-date stats, articles and videos about every prospect, scouting reports, and more!