MLB prospect call-ups are accelerating as we head into June, and the fantasy baseball waiver wire is full of names worth adding right now. In the final stretch of May 2026, six notable prospects earned promotions to the major leagues: Tommy Troy (Arizona Diamondbacks), Pedro Ramirez (Chicago Cubs), Kevin Alcantara (Chicago Cubs), Gabriel Gonzalez (Minnesota Twins), Jonah Tong (New York Mets), and Jhostynxon Garcia (Pittsburgh Pirates). Whether you are looking for a power bat, a stolen base threat, or a starting pitcher with strikeout upside, this group covers the full spectrum of fantasy value. Below is a complete breakdown of every recent call-up, including minor league stats, scouting context, playing time outlook, and fantasy baseball add recommendations for redraft and dynasty leagues. 

Tommy Troy | INF/OF | Arizona Diamondbacks

The Call-Up

Tommy Troy made his anticipated MLB debut on May 24, after the Diamondbacks placed Lourdes Gurriel on the 10-day IL with a strained left hamstring. Arizona's 40-man roster was sitting at 39, so no additional roster moves were required. Troy had been tearing up Triple-A Reno all season and was simply too good to ignore any longer.

The Prospect

Troy is a 24-year-old from San Jose, California, who was drafted 12th overall by Arizona in the 2023 MLB Draft out of Stanford. He blew through the minor league system in a hurry, and after a somewhat difficult 2024 campaign dealing with injuries, he came into 2026 looking like a different player. He entered his promotion slashing .307/.397/.449 with a .846 OPS in Triple-A, adding three home runs and 28 RBI while showcasing the plus speed that evaluators have always viewed as his best tool. He was hitting .375/.375/.500 in big-league spring training this year as well.

Troy's most valuable asset is his versatility. He started the 2026 minor league season playing 18 games at second base, 18 in left field, and seven in center field. That positional flexibility was the primary reason Arizona felt comfortable calling him up to fill an outfield vacancy rather than searching for a more traditional corner outfielder type.

Fantasy Baseball Outlook

The path to consistent playing time in Arizona is complicated. Geraldo Perdomo and Ketel Marte both block Troy at his natural infield positions, which means his big-league role is likely concentrated in the outfield for now. Manager Torey Lovullo has been complimentary of his ability and work ethic, but the honest reality is that Troy may be a short-term fill-in piece until Gurriel Jr. returns. If he stays hot and forces the Diamondbacks' hand, the playing time picture could evolve. In deeper mixed leagues and NL-only formats, Troy is worth picking up for his speed-based upside and ability to help across multiple categories. Dynasty leagues should have had him rostered already. 

 

 

 

Pedro Ramirez | 2B/3B | Chicago Cubs

The Call-Up

The Cubs promoted Pedro Ramirez on May 22, with Matt Shaw heading to the 10-day IL due to back tightness. Shaw's IL stint was retroactive to May 20, opening a clear roster spot for Ramirez to make his major league debut. Ramirez is the Cubs' No. 2 prospect per MLB Pipeline and has been one of the best hitters in all of Triple-A this season.

The Prospect

Ramirez is a 22-year-old Venezuelan switch-hitter who has been dominant at Triple-A Iowa. He entered his promotion slashing .312/.395/.547 with nine home runs, 11 doubles, and a triple through 196 plate appearances. His strikeout rate of 16.3 percent sits well below the 22-plus percent major league average, and he was walking at a 10.7 percent clip. On the bases, he went 19-for-21 in stolen base attempts, giving him both contact and speed upside in fantasy. By wRC+, he was performing 36 percent better than Triple-A league average.

His power production represents a genuine step forward. The nine home runs through roughly half a Triple-A season are already a career high. Ramirez is also a strong defender, having won a minor league Gold Glove at third base in 2025. He can also play second base, giving the Cubs lineup flexibility.

Fantasy Baseball Outlook

The playing time path is complicated here. Alex Bregman occupies third base, Dansby Swanson is at short, and Nico Hoerner handles second. That leaves limited starting opportunities for Ramirez unless he forces the issue with his bat or an injury creates a longer opening. He may see scattered starts against certain pitching matchups early. In the near term, Ramirez carries more dynasty value than redraft value, but if Shaw's back issue lingers, Ramirez could find himself in the lineup far more than expected. He is worth picking up in NL-only and deep leagues given his skill set across average, power, and speed.

Kevin Alcantara | OF | Chicago Cubs

The Call-Up

The Cubs designated infielder Nicky Lopez for assignment on May 23 and recalled Kevin Alcantara from Triple-A Iowa. This is not Alcantara's first major league cup of coffee, but it is his most significant call-up. He had brief stints in 2024 and 2025 but never stuck. The difference this time is what he has done at the plate in 2026.

The Prospect

Alcantara is a 23-year-old outfielder from the Dominican Republic who was acquired as part of the Anthony Rizzo trade with the Yankees back in 2021. Nicknamed 'The Jaguar,' Alcantara has seen his prospect stock yo-yo over the years, but his 2026 season at Triple-A Iowa has been impossible to ignore. He entered the promotion with 15 home runs in 41 games, leading all Triple-A hitters and ranking third among all minor league hitters. His most recent blast came off the bat at 107.1 mph.

The power tool has always been the carrying skill here. In 2025, he slashed .266/.348/.468 with 17 home runs across 431 Triple-A plate appearances. The 2026 version has taken it to another level. He plays solid center field defense as well, which gives the Cubs a versatile option in the outfield.

Fantasy Baseball Outlook

Alcantara is a power-first profile. If he gets consistent at-bats against major league pitching, double-digit home runs in a half-season are genuinely achievable. The concern is whether the Cubs will keep him in the lineup given their existing outfield structure. He is worth a pickup in any format where home run upside is valued. The plate discipline numbers in the minors (he posted a 23-24 percent strikeout rate) suggest contact will be a work in progress, but the raw exit velocity and lift profile are legitimate. This is a player to watch closely in the first two weeks.

 

 

 

Gabriel Gonzalez | OF | Minnesota Twins

The Call-Up

The Twins promoted outfielder Gabriel Gonzalez from Triple-A St. Paul on May 21, with infielder Tristan Gray placed on the paternity list. It is a short-term opportunity on the surface, but Gonzalez has earned his shot, and the Twins have an interest in seeing what they have in the 22-year-old.

The Prospect

Gonzalez is a Venezuelan-born outfielder who was acquired from Seattle in the Jorge Polanco trade ahead of the 2024 season. He had a breakout 2025 campaign, earning Twins Daily's Minor League Hitter of the Year award after posting a .909 OPS across three levels from High-A all the way to Triple-A. His 2026 numbers at Triple-A have been more modest, a .216/.294/.392 slash line with eight home runs and 21 RBI in 44 games, but there are mitigating factors. His BABIP has run suppressed at .231, suggesting some poor luck, and he caught fire in May with six multi-hit games in just 16 contests.

The tools are genuine. He brings a combination of power and athleticism that made him a top prospect in Seattle's system before the trade. His June 2023 amateur signing generated significant buzz, and evaluators have consistently praised his bat speed and raw power potential.

Fantasy Baseball Outlook

The path to sustained playing time in Minnesota is worth monitoring. This call-up is tied specifically to Gray's paternity absence, meaning Gonzalez could be optioned back to Triple-A quickly. His 2026 strikeout rate has ticked up to 19-20 percent, and his swing-and-miss numbers in Triple-A raise some questions about his immediate readiness. That said, the power-speed combination gives him multi-category upside if he earns everyday reps. Grab him in deep AL-only leagues and keep an eye on roster moves in Minnesota over the next week.

Jonah Tong | RHP | New York Mets

The Call-Up

The Mets recalled right-hander Jonah Tong on May 22 and simultaneously designated veteran closer Craig Kimbrel for assignment. The organizational messaging was clear. New York is pivoting to its young arms, and Tong is among the best of them. He appeared in relief against the Marlins on May 22 and made an immediate impression.

The Prospect

Tong is a 22-year-old Canadian right-hander from Markham, Ontario, who was a seventh-round pick in 2022. His arm has been one of the best in the minor leagues over the last two seasons. In 2025, he led all of professional baseball in ERA (1.43) and strikeouts (179 across 113.2 innings), spanning Double-A Binghamton and Triple-A Syracuse. His 2026 Triple-A numbers have been uneven, a 5.68 ERA in nine starts with 55 strikeouts in 38 innings, but he has shown flashes of his true ceiling throughout.

When Tong made his 2026 debut in relief against Miami, he was electric. He delivered three hitless innings on just 28 pitches, touching 98.5 mph with his fastball and generating two strikeouts. The Mets confirmed after the game that he would remain on the roster and pitch against the Reds the following week.

Fantasy Baseball Outlook

Tong is one of the more intriguing prospects to track in fantasy right now. The Mets' rotation has been a revolving door of injuries and underperformance, creating a genuine opportunity for him to slot in as a starter. His strikeout upside is legitimate, and the fastball-heavy arsenal plays against big-league hitters when his command is dialed in. The risk is the same as it was in Triple-A: command inconsistency. He issued consecutive walks in his opening Triple-A frame this season before settling in. If he can control the zone, Tong has front-of-rotation upside. In mixed leagues, he is a streaming option with SP eligibility upside. In NL-only, he belongs in the rotation.

 

 

 

Jhostynxon Garcia | OF | Pittsburgh Pirates

The Call-Up

The Pirates recalled outfielder Jhostynxon Garcia from Triple-A Indianapolis on May 20, with the roster move linked to Ryan O'Hearn landing on the IL with a right quad strain. Garcia, known throughout baseball by the nickname 'The Password' due to the complexity of his first name (pronounced 'JOES-tin-son'), made his Pirates debut the same day in St. Louis, going 1-for-4 with an eighth-inning single.

The Prospect

Garcia is a 23-year-old Venezuelan outfielder acquired from the Red Sox in December 2025 in the Johan Oviedo trade. He brings significant raw power, the kind of exit velocity that stops a room. In one stretch in early May at Triple-A Indianapolis, he had three consecutive home runs in a single game at 107.3, 109.9, and 113.5 mph exit velocity. That type of raw thunder gets attention quickly.

Garcia led the Red Sox minor league system in home runs in both 2024 (23) and 2025 (21). After a slow start to 2026, he caught fire in May. He had spring training numbers of .405/.463/.595 with the Pirates before the season, signaling the tools were there.

Fantasy Baseball Outlook

The plate discipline numbers are the primary concern. Garcia's Triple-A chase rate in 2026 sits around 43 percent against a league average near 30. His zone contact rate and swinging-strike numbers are also elevated. Major league pitchers will attack those weaknesses from day one. If he can make enough contact to stay in the lineup, the raw power translates to home run production in bunches. This is a high-variance player who fits better in a deep league or dynasty context. In redraft leagues, he is a speculative add with real boom-or-bust potential. The power upside is undeniable. The strikeout risk is equally real.