Marlins righty Adam Mazur will undergo elbow surgery today and miss the entire 2026 season as a result, MLB.com’s Christina De Nicola reports. Mazur wasn’t locked into Miami’s rotation but was among the top depth options in the event of an injury to one of Sandy Alcantara, Eury Pérez, Chris Paddack or likely fourth and fifth starters Max Meyer and Braxton Garrett. It’s not yet clear which type of procedure he’ll require. Mazur recently reported elbow discomfort to the team and was quickly sent for an evaluation with renowned surgeon Keith Meister.
Mazur, 24, came to the Marlins alongside infielder Graham Pauley, top pitching prospect Robby Snelling and minor league infielder Jay Beshears in the 2024 trade that sent lefty Tanner Scott and righty Bryan Hoeing to the Padres. He’s a 2022 second-rounder who posted big numbers up through the Double-A level but has run into some trouble at both the Triple-A level (5.03 ERA, 168 1/3 innings) and in more limited major league work (6.22 ERA, 63 2/3 innings).
In 2025, Mazur split the season between Triple-A Jacksonville and Miami, tossing 107 1/3 innings with a 4.36 ERA at the former and 30 innings with a 4.80 ERA with the latter. He turned in solid strikeout and walk rates in Jacksonville but was far too homer-prone to keep his ERA down. Homers were less of an issue in his six big league starts, but he recorded a bottom-of-the-barrel 13.7% strikeout rate in his 30 MLB frames.
Having traded Edward Cabrera to the Cubs and Ryan Weathers to the Yankees, the Marlins entered camp with Alcantara, Pérez and free agent signee Paddack locked into rotation spots. Meyer and Garrett have both pitched only four official spring innings, but they’re both former top-10 picks and top prospects who have experienced success in the majors previously.
Garrett notched a 3.63 ERA in 247 2/3 innings from 2022-23 before a 2024 UCL surgery wiped out his entire 2025 season. Meyer has a 5.29 ERA in 25 career starts but has had big starts to his season in both 2024 and 2025. Miami optioned him in 2024 despite that big start, keeping him down for months and leaving Meyer six days shy of the service time he’d have needed to be a free agent following the 2028 season instead of the 2029 season. In 2025, a hip injury surfaced and eventually required season-ending surgery.
Depth options on the 40-man roster include swingman Janson Junk (4.17 ERA, 110 innings in 2025), Ryan Gusto (acquired from the Astros in last summer’s Jesús Sánchez trade), Bradley Blalock (acquired from the Rockies in January) and 2020 second-rounder Dax Fulton (healthy again after multiple injuries, including a June 2023 internal brace procedure). The aforementioned Snelling and fellow left-hander Thomas White are the two most notable rotation arms in waiting; both rank among baseball’s top 100 prospects, but neither has needed to be added to the 40-man roster just yet. That’ll very likely change in ’26, as both are considered nearly MLB-ready. White is the more touted of the two but has a bit less experience in the upper minors, given his status as a 2024 draftee compared to Snelling, a 2023 draftee.
Since Mazur is on the 40-man roster, has big league experience and was in major league camp at the time of injury, he’ll be placed on the major league injured list. If and when Miami needs an additional 40-man roster spot, he’ll be placed on the 60-day IL. Mazur will accrue a full year of service time and retain the lone minor league option year he has remaining. Miami will be able to control him via arbitration through at least the 2031 season.
That stinks big time
Horrible for Mazur and the Marlins. Thankfully for Miami they still have lots of pitching depth, but this isn’t good at all for anyone.