JUPITER, Fla. – Marlins right-hander Adam Mazur underwent UCL reconstruction with an internal brace (hybrid) on Wednesday, which has a recovery period of 13-14 months. Dr. Keith Meister performed the surgery in Dallas.
Mazur experienced right elbow discomfort during his Grapefruit League outing on March 2, feeling something on a 95.3 mph fastball he threw to the Cardinals' Pedro Pagés in his second inning. He would go on to retire Pagés and the next two batters in order to end his outing.
"When we got the news that he was visiting the doctor yesterday, and got the news that that was the course of action, just reached out to him," manager Clayton McCullough said. "He's bummed, as anybody would be, but he's in terrific hands, and we've got a great group here that's going to get him back stronger than ever. And Adam will be incredibly motivated to embrace the rehab. So I think [give] as much support from afar [as] we can, and then when Adam gets back here, [we'll be] able to check in with him. So I think his spirits are as high as one can be with getting that news."
Following the Grapefruit League start, Mazur didn't mention any discomfort. The 6-foot-2, 180-pounder did discuss adding 15-20 pounds over the offseason to "hopefully help that sustain me throughout the year."
Mazur, who compiled a 4.80 ERA in six starts for the Marlins last season, was part of Miami’s starting-pitching depth after the projected Opening Day rotation of Sandy Alcantara, Eury Pérez, Braxton Garrett and Chris Paddack. Other 40-man-roster options include fellow righties Janson Junk, who returned from a Grade 1 right ankle sprain on Saturday, Bradley Blalock and Ryan Gusto. Miami recently optioned lefty Dax Fulton to Triple-A Jacksonville, while non-roster invitee Robby Snelling (MLB Pipeline’s No. 39 overall prospect) remains at big league camp and continues to impress.
In 2025, Miami used 15 different starting pitchers, four of which were openers. This spring, the Marlins are building up relievers Tyler Phillips, Michael Petersen and Lake Bachar to be able to pitch 2-4 innings.
“You never can have enough pitching," McCullough said. "[I] said [it] at the onset, and we'll probably continue to say it all season long. There's still a number of pitchers that are in our camp that we have been getting built up, and we'll continue to get built up, and we'll see when the dust settles here in three weeks or so what the 26 looks like for Opening Day, knowing that there's going to be a lot of moving parts throughout the year.”