As baseball’s stretch run nears, major league teams are turning to Triple-A for reinforcements, unveiling a wave of August call-ups destined to make an impact. This season’s surprise promotions feature a blend of high-upside prospects and savvy veterans who could change the trajectory of their organizations. Here’s a look at some of the most intriguing Triple-A prospects making their mark in the majors this month.
One of the top pitching prospects captivating attention is Nolan McLean of the New York Mets. McLean, scheduled to make his MLB debut in mid-August, posted impressive Triple-A numbers with a 2.45 ERA, 1.13 WHIP, and 10.1 strikeouts per nine innings. Notably, McLean maintains a 55% ground ball rate, a key indicator of his ability to induce weak contact and limit damage. Mets management heralds his composure and “two-way ability to dominate.” Said Mets pitching coach Phil Regan, “Nolan has the stuff and mindset of a frontline starter. We expect big things from him in New York.” His smooth transition to the majors will be crucial for a Mets rotation aiming to find postseason consistency.
In the American League, the Baltimore Orioles boast Samuel Basallo, a young catcher-first baseman hybrid who has dazzled at Triple-A Norfolk. Despite being just 20 years old, Basallo’s advanced bat speed and power have drawn analytics comparisons to MLB slugger Kyle Schwarber. At the plate, Basallo carries a formidable .978 OPS with 23 home runs and more walks than strikeouts, indicative of elite plate discipline. Orioles GM Mike Elias enthused, “We’re excited to see Sammy’s progression. His maturity at such a young age bodes well for the future.” Basallo is poised to fill multiple roles in Baltimore’s lineup.
Meanwhile, the St. Louis Cardinals recently promoted JJ Wetherholt, a well-rounded infielder with rapid ascension through the minors. Wetherholt’s blend of average, power, and speed earned him a .930 OPS at Triple-A this season, coupled with 14 home runs and 17 stolen bases. His bounce-back from a brief injury and adaptability across shortstop and second base makes him a valuable asset late in the season. Cardinals manager Oliver Marmolejo remarked, “JJ’s a natural competitor who can really help us down the stretch.”
Pirates pitching prospect Bubba Chandler’s call-up hints at the team’s intent to test potential rotation depth. Despite struggles in Triple-A with a 6.94 ERA in recent starts, Chandler boasts a strong minor league track record and strikeout capability. Pirates pitching coordinator Jeff Brigham stated, “We want to see Bubba’s reaction to major league hitters. Sometimes a promotion is the best way to reset confidence.”
Other notable names include Marlins’ right-hander Robby Snelling, Phillies outfielder Justin Crawford a speedster with a slashing .331 average and 37 steals and Giants slugger Bryce Eldridge, whose early Triple-A power surge had scouts buzzing before a recent slump.
These late-season call-ups are an important crossroads, balancing potential rookie eligibility timelines with the immediate needs of contenders and rebuilding clubs. As this new wave of talent hits the big leagues, their performances over these crucial weeks could solidify roster spots for years to come or temper expectations moving forward.
The excitement around these August promotions lies not just in their stats but in the tangible hope they bring: young players with fresh energy, raw talent, and untapped potential ready to push their teams closer to playoff dreams. Baseball fans should watch closely as these prospects seize their moment, turning minor league promise into major league impact.

