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Adam Macko ranks as Blue Jays Nation’s 27th-best prospect in 2025 mid-season update
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Photo credit: © Nick Turchiaro-Imagn Images
Ryley Delaney
Aug 30, 2025, 08:00 EDTUpdated: Aug 28, 2025, 04:19 EDT
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Adam Macko is an internal option for the Toronto Blue Jays to call up in the final month of the 2025 season.
This is Blue Jays Nation’s annual mid-season prospect list, where we’ll take a look at the 50 best prospects in the Toronto Blue Jays organization. I’ll look at the player’s stats, what other publications have to say, as well as my own observations of the players.
Macko is just one of four prospects that rank on this list who are also on the 40-man roster. The left-handed starter’s numbers aren’t eye-popping, but he ranks as our 27th-best prospect in the mid-season update. If you missed who ranked 28th, you can read about Landen Maroudis here.

Getting to know Adam Macko…

Position Starting pitcher
Throws: Left
Born: December 30th, 2000
Acquired: Trade with the Seattle Mariners
Previous ranking: 10th (2025 pre-season)
Macko has an interesting story, as he was born in Slovakia, eventually moved to Ireland and was raised there, before joining Vauxhall Academy in Alberta, playing alongside fellow Blue Jays’ prospect Damiano Palmegiani. Macko was selected in the seventh round of the 2019 draft by the Mariners. The 6’0”, 170 lbs left-handed pitcher made his professional debut that same season, posting a 3.09 ERA and 3.83 FIP in 23.1 innings pitched, with a 33 K% and 11.7 BB%.
Thanks to the global pandemic, Macko and all other minor leaguers didn’t play affiliated ball in 2020, but he returned for the 2021 season. Unfortunately, he made just nine starts where he had a 4.59 ERA and 3.33 FIP in 33.1 innings pitched, missing a large portion of the season due to injury.
It was much of the same for Macko in 2020, making starts in eight games at the beginning of the season, he had a 3.99 ERA and 3.77 FIP in 38.1 innings pitched. He missed the rest of the season, only returning for the Arizona Fall League.
In mid-November 2022, the Blue Jays sent Teoscar Hernández to the Mariners in exchange for Erik Swanson and Macko. In his first season with the Jays’ organization, Macko stayed relatively healthy and posted a 4.81 ERA and 3.97 FIP in 86 innings pitched with the High-A Vancouver Canadians. One issue that plagued Macko early in his career (and has come back this season) is command issues, but in 2023, his BB% dropped to 10.8%. His previous lowest BB% was 11.9%.
The lefty split his 2024 season between the Single-A Dunedin Blue Jays (rehab), the Double-A New Hampshire Fisher Cats, and the Triple-A Buffalo Bisons. Most of his season was spent in Double-A, where he had a 4.87 ERA and 3.72 FIP in 81.1 innings pitched, only missing a small portion toward the end of the season due to injury.  Macko’s BB% also dropped to a career-best 9%.
Unfortunately, Macko spent the start of the season on the Injured List due to knee surgery before the start of the season. His walk rate has also been a little concerning. Not including his five appearances in Single-A on a rehab assignment, Macko has a 5.62 ERA and 4.97 FIP in 49.2 innings pitched with the Bisons, with a 19.2 K% and 14.4 BB%.
Some of that can be attributed to rust, because over his past six appearances, Macko has a 2.92 ERA and 5.38 FIP in 24.2 innings pitched. His K% has also increased to 21.8% in this stretch, but walks remain an issue with a 15.8 BB%, hence the high FIP.
Macko ranked as MLB Pipeline’s 23rd-best prospect in their mid-season update. The fastball is impressive, averaging in the mid-90s, with an average slider and above-average curveball. Macko also features a below-average changeup, and his command hasn’t been great this season. The Blue Jays may call him up in September when the rosters expand if they need some length out of the bullpen.
Ryley Delaney is a Nation Network writer for Blue Jays Nation, Oilersnation, and FlamesNation. She can be followed on Twitter @Ryley__Delaney.

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