Welcome back to Diamond Diplomas, a weekly rundown of all the players knocking on the door to the major leagues. Whether you compete in the deepest of dynasty leagues, or simply want to win the office redraft title, Prospects Live has you covered. For an overview of the tier system used to prioritize players in this series, take a look at the first article in the series here:

Diamond Diplomas 5/6/25
Lucas Morel (@theprospectprof) delivers a rundown of all the players getting their caps and gowns ready for graduation to the major leagues. Class is in session, time to find out who you need to add to your roster or watch list this week.
Prospects LiveLucas Morel

Notable call-ups keep happening by the day it seems, as the playoff hunt intensifies and rebuilding teams look to give their top prospects some big league exposure. Check out all the names you need to know in the latest weekly Report Card (all statistics courtesy of Baseball Reference, Baseball Savant, TJStats, Fangraphs and Milb.com, updated as of the conclusion of play on August 24):

Weekly Report Card

Called Up:

  • Jhostynxon Garcia, OF (BOS): The Red Sox finally found their login information. “The Password” has been one of the most fun prospect success stories to follow through the minor leagues over the last couple of seasons, and now he will get his chance to perform at the big league level. Garcia’s first few at-bats have looked a bit nervy, and he may not remain with the Red Sox once Wilyer Abreu returns from injury, so he remains more of a dynasty option than a redraft priority for now.
  • Carson Williams, SS (TB): Williams has put both his notable power and speed on display quickly to begin his major league career, notching his first home run in his debut and then swiping his first bag on Sunday. There will be plenty of swing-and-miss in his game going forward, but his counting stat production should make him viable in deeper redraft leagues to close out the season, as long as he stays hot.
  • Zack Gelof, 2B (ATH): Last week’s One to Watch becomes one of this week’s call-ups! News broke late on Monday of Gelof’s impending return to the Athletics, and while he will need to earn redraft relevance with his plate production now that he is back up, dynasty managers will be hoping he stays hot at the plate and builds up some credibility as a long-term asset to close out the 2025 season.
  • Bubba Chandler, P (PIT): While a bullpen debut was not on anyone’s Bubba Chandler bingo card, the flame-throwing right-hander delivered an electric outing nonetheless. He hit triple-digits with his fastball en route to a historic four-inning save, and did not give out a single free pass. Chandler’s lack of consistent control in Triple-A seems to have been the result of frustration and boredom, more than anything, and while he lacks short-term fantasy value in shallow redraft because of his current piggybacking role, his dynasty future as a frontline starter remains exciting.
  • Taj Bradley, P (MIN): While I am bullish on Bradley long-term, his first start for the Twins was a forgettable one, to say the least. The former Rays hurler allowed seven earned runs in five innings, recording just one strikeout. After this rough showing, Bradley probably should be considered a dynasty-only asset until he proves otherwise.
  • Mick Abel, P (MIN): Like his fellow deadline acquisition Bradley, Abel also struggled mightily in his first Twins appearance. His Saturday start lasted just three innings, as he conceded six earned runs on seven hits, and rumors flew on social media of possible pitch tipping. Twins fans probably feel rather demoralized by how Bradley and Abel looked, but they remain intriguing buy-low options in dynasty formats in spite of these poor showings, given the high likelihood that both pitchers open 2026 in the Twins rotation.
  • Carson Whisenhunt, P (SF): Whisenhunt’s demotion back to Triple-A lasted just ten days, as a knee injury to Landon Roupp led San Francisco to call him back up this past week. The southpaw put in a serviceable shift in his return to the majors, tossing four innings of two-run baseball. Redraft managers should still look elsewhere for streaming help down the stretch, given Whisenhunt’s middling performance as a big leaguer so far, but dynasty managers will hope he ends the season strong and secures a rotation role in 2026.
  • Parker Messick, P (CLE): Messick looked about as comfortable as a debuting pitcher possibly can on Wednesday, pitching into the seventh inning against Arizona and giving up just one run on seven hits, with six strikeouts. This quality start earned him another turn in the Guardians’ rotation, and he could provide some underrated streaming value down the stretch if he keeps hold of a starting job.

Locked In:

  • Sal Stewart, 3B (CIN): Stewart’s torrid run at Triple-A continues. The infielder added more homers to his tally this week, bringing his season total to a career-best 19. If he keeps hitting like this, a September debut with Cincinnati could very well be in the cards.
  • Kyler Fedko, OF (MIN): Last week’s Sleeper Pick made plenty of noise for Triple-A St. Paul in the days that followed, showing off his notable power and speed by hitting two home runs and stealing two bases. He seems likely to be the next man up for Minnesota if they choose to dip into their minor league system for position-player reinforcements.
  • Alika Williams, 3B/2B (PIT): The Pirates have a few older names biding their time at Triple-A, but Williams just may have leapfrogged the bunch with his performance this past week. The versatile infielder stuffed the stat sheet with four extra-base hits (including two home runs) and drove in ten runs, making his case for a call-up that much stronger. He holds deep dynasty league relevance primarily, but any hot bat is worth keeping an eye on as the fantasy season reaches its final stage.
  • Jonah Tong, P (NYM): According to reports, Tong has played his way into the mix as a late-season option in the rotation for the Mets, and his most recent start showed exactly why. The 22-year-old only allowed five hits over six scoreless innings, striking out eight and walking just one batter. Read on for more on his Triple-A success later.
  • Payton Tolle, P (BOS): I cannot wait to title a future Diamond Diplomas article “For Whom the Bell Tolle’s”. Fresh off of featuring as a Priority Add in this series, Tolle dominated in his latest Triple-A outing. He punched out nine batters in the span of five walk-less innings, allowing only one hit and one run. Boston also has Kyle Harrison in the mix for a call-up, but Tolle continues to make his case for a September look in the majors.
  • Robby Snelling, P (MIA): Speaking of pitchers knocking on the door to the Show, Snelling looks as ready as ever to make the leap to Miami. After his latest quality start, in which he held a talented Worcester team scoreless, Snelling’s Triple-A ERA now sits at a remarkable 1.13 through seven starts, leaving the southpaw with little left to prove before joining the Marlins. If and when he does do so in 2025, he deserves immediate consideration as a waiver/free-agency pickup in redraft leagues, particularly those with 12+ teams.

Dropped Off:

  • Carson Benge, OF (NYM): While Benge has done nothing but excel this season across three levels of the Mets’ system, he landed on the injured list recently after being hit by a pitch. No official word or concrete reporting has come out about the severity of his injury, so all hopes of him debuting in 2025 should be put on ice until further notice. If Benge does return soon, and picks up where he left off, then he could potentially still earn a September cup of coffee.