Adam Macko
It appears it will only be a matter of time before Adam Macko makes his big league debut. The left-handed pitcher, one of three pitchers on the 40-man roster in this list, began the 2025 season on the injured list but returned in May and joined the Buffalo Bisons in early June. In 64 innings pitched with the Bisons, Macko had a 5.06 ERA and 4.56 FIP in 64 innings of work, with a 22.6 K% and 12.5 BB%.
While Macko is one of their best MLB-ready starting pitchers, his skills would certainly come in handy in the bullpen, where his walk rate wouldn’t be as detrimental. It’s worth noting that Macko lowered its BB% to 8.8% in 2024.
Don’t be surprised if Macko is called up for a Lázaro Estrada or Paxton Schultz type role sometime in 2026.
Trenton Wallace
Trenton Wallace has been one of the more interesting left-handed pitchers in the Blue Jays system for a few seasons now. The 26-year-old made 26 starts in 2024 and posted a 26.5 K% and 11.7 BB%, but struggled a bit once he reached Triple-A.
Last season, Wallace spent most of the season with the Bisons, posting a 4.18 ERA and 4.70 FIP in 51.2 innings pitched. Notably, after his first eight games, Wallace shifted to a multi-inning role as a reliever in the Bisons’ bullpen.
Wallace possesses four pitches: a slider, a changeup, a cutter, and a high-80s sinker. Despite the slow speed, Wallace has racked up plenty of swings and misses during his minor league career, and he could also fill a role like Estrada and Schultz did in 2026.
Ricky Tiedemann
Ricky Tiedemann’s ceiling is that of a starter at the front of the rotation. The left-handed pitcher reaches the upper 90s with his fastball, with a plus changeup and a plus slider. However, Tiedemann missed the entire 2025 season due to recovery from Tommy John surgery and struggled with injuries and poor control in 2023 and 2024.
But who knows. Perhaps Tiedemann deserves a spot in the rotation if there is an injury issue.
TJ Brok
It’s been a tough two seasons for TJ Brock. Selected in the sixth round of the 2022 draft, he made his debut shortly thereafter and had a solid 2023 season, posting a 4.78 ERA and 3.76 FIP in 52.2 innings pitched, along with a 37.3 K% and 9.9 BB%.
Entering the 2024 season, Brock was one of the better prospects for the Blue Jays, but he threw just 11.1 innings in an injury-riddled season. Brock pitched another seven innings in the 2024 Arizona Fall League
Unfortunately, he missed the entire 2025 season due to Tommy John surgery, and his timetable for the 2026 season is unknown. When healthy, he has a mid-90s fastball and a plus slider. He is available to be selected in the Rule 5 draft.
Bastard angel
Speaking of the Rule 5 draft, if the Blue Jays want to retain the services of Angel Bastardo, he will. need to be on the Jays’ 26-man roster for the duration of the season. Bastardo was selected in the 2024 Rule 5 draft and missed the entire season due to Tommy John surgery, meaning the same rules apply to his 2026 season.
If the Jays select him, he will have to clear waivers And be offered back to the Boston Red Sox. Before needing Tommy John surgery in 2024, Bastardo had a 5.36 ERA and 4.28 FIP in 45.1 innings pitched, with a 26.6 K% and 10.6 BB%.
In his last full healthy season, he had a 4.68 ERA and 4.16 FIP in 119.1 innings pitched between High-A and Double-A. The 23-year-old also struck out 29.4% of the batters he faced.
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