2 Blue Jays top prospects who'll be begging for a call-up by May, 2 who will struggle

While the Toronto Blue Jays front office is firmly focused on assembling the best players to bring north when the season begins on March 27, the roster is usually a revolving door. The players that make the Opening Day roster are never guaranteed to still be there when the season ends. That's why it's so important for players who don't make the initial cut to keep playing hard when the minor league season begins, in the hopes that they will be just a phone call away from getting to The Show.

As Spring Training winds down, here are two of the Blue Jays top prospects that could earn themselves a call up after the first month, and two others who might not be ready just yet.

These top prospects could make their major league debuts by May

No. 13, Josh Kasevich - 2B/3B

Kasevich actually dropped in the Blue Jays Top 30 prospect rankings from the end of 2025 to the first list published in 2026, but part of that was based on his injury plagued 2025 campaign. Kasevich played in just 42 games between his rehab stints and his 29 games at Triple-A Buffalo. He managed just a .228/.331/.243 slash line combined throughout the year, but a fully healthy Kasevich impressed during the Arizona Fall league, and continued to swing a hot bat in Spring Training.

The 25-year-old infielder has hit .273/.351/.424 in 19 Grapefruit League games and while he doesn't offer much in the way of hitting for power, with just one home run this spring, he has an excellent command of the strike zone, with a miniscule 5.4% strikeout rate in spring action. Kasevich appears to be blocked coming out of spring with the Blue Jays likely bringing Ernie Clement, Davis Schneider, Andrés Giménez, and Kazuma Okamoto to Toronto to begin the season, while Leo Jiménez, who is also vying for that backup infield role, is out of options and that may give him the edge over Kasevich.

Regardless, if Kasevich keeps up this kind of approach and continues to hit the ball hard, it will be difficult for the Blue Jays to keep him down for long.

No. 21, Adam Macko - LHP

Acquired ahead of the 2023 season in the deal that sent Teoscar Hernandez to Seattle, Macko has slowly worked his way up through the system while dealing with a couple of injuries that have slowed his progress. However, Spring Training 2026 might be the year to look back on as the year Macko put it all together. In three spring innings with the Blue Jays, Macko hasn't given up a hit, while striking out two.

He also impressed at the World Baseball Classic for Team Canada, pitching in three games and allowing just three hits with no earned runs while striking out two hitters in 2.1 innings pitched. The lefty could be thrust into the MLB bullpen quickly if that area of the team starts to falter. The Blue Jays are already thin on left-handed relievers to begin the season with just Mason Fluharty and Brendon Little expected to make the team out of camp. Eric Lauer, another lefty, is likely joining the rotation in the absence of José Berrios and Trey Yesavage.

Should Little or Fluharty struggle, or the Blue Jays find they need an extra southpaw in the 'pen, Macko could be the first guy they call.

No. 9, RJ Schreck - OF

Schreck was almost the position player equivalent of Yesavage last season. The right handed pitcher Yesavage went through every level of pro-ball, ending his season in the majors, while Schreck started his 2025 campaign in Single-A and ended the year with Triple-A Buffalo. It was a quick rise with Schreck showing a good eye for the zone (16.4% walk rate) through all leverls and ended up hitting a combined 18 home runs with an .845 OPS and .288 BABIP.

However, he may have hit a wall in spring, slashing just 150/.190/.200 in 12 games with Toronto. He also had a tough time at the WBC collecting just two hits in 11 at bats, although he did walk four times and only struck out twice. Schreck will probably need some time to adjust to a higher level of pitching to begin the year in his first full season of Triple-A baseball, so it's likely he won't be setting the world on fire before the end of April.

No. 5, Ricky Tiedemann - LHP

It's been a slow return to the mound for Tiedemann who, not too long ago, was the Blue Jays number one prospect. But since 2024, Tiedemann has been trying to recover from Tommy John Surgery and was hoping to use 2026 as his year to re-establish himself among the Blue Jays best young pitchers. But the 23-year-old left-hander ran into some troubles early on in camp. He was shut down due to elbow soreness, which ins't completely uncommon for pitches coming off that proceedure.

However, Tiedemann hasn't appeared in a spring game, and by the time he gets back into game action, the season could be well underway. It's also been so long since he's faced opponents during a live game, that it wouldn't be a huge surprise if he struggles somewhat out of the gate. It would be a safe bet to say that Tiedemann likely won't be making his MLB debut before May.