MLB Pipeline Top-20 Prospects Likely to Make 2026 Opening Day Rosters

MLB Pipeline writers Jim Callis, Jonathan Mayo and Ben Weinrib ran the numbers and narrative on the sport’s most coveted prospects, assigning percent-chance odds for who will break camp with big-league clubs. Spring training is unusually crowded with young talent: 72 prospects from MLB Pipeline’s Top 100 are in big-league camp, 17 of the top 20 carry a 2026 ETA for the majors, and analysts judged eight players better than 50 percent likely to make Opening Day rosters.

The conversation on the MLB Pipeline Podcast centered on how teams will weigh development versus roster need. Pittsburgh’s Konnor Griffin, the No. 1 prospect, drew a split call from the analysts - Callis at 40 percent and Mayo at 50 percent. Mayo framed the case in stark terms: “He’s 19. He played one year of pro ball and just barely played above A-ball. However, he had one of the best seasons in Minor League Baseball ever, especially for a teenager. A 20/60 season, making it to Double-A. He’s going to get a very long look. There’s not a shortstop that’s better or blocking him. I would love for the Pirates to break camp with him, but I’m not convinced they will. I will say that he’s in competition. […]” ESPN analyst David Schoenfield pushed a bullish counterpoint, projecting that Griffin “is going to make the Opening Day roster” and even forecasting a 3-WAR season while noting Griffin has “just 21 games above Single-A” and will still be only 19 going into the season.

Toronto’s Trey Yesavage drew near-consensus certainty from the analysts. Callis and Mayo each put him at 100 percent, with Callis saying, “I cannot imagine why he would not make the team,” and Mayo replying, “Agreed.” Yesavage’s firm odds reflect a clearer path to big-league innings for the Blue Jays’ pitching depth.

Not every blue-chip name was headed to big-league camp. Washington’s 2025 No. 1 overall pick Eli Willits was the lone top-20 player not in camp, and both Callis and Mayo assigned him 0 percent chance of making Opening Day. Minnesota’s Walker Jenkins drew a more cautious look from Callis, who placed him at 30 percent and reasoned, “This was a tough one because their outfield is not real great. They traded away so many guys ... they're rebuilding. You could make the case on talent, and as much as I like Walker, he's been injured, he's never played more than 84 games in a season. I think they're going to give him more time at Triple-A, and they're not trying to win this year, so there's no reason to expedite him.”

ESPN voices added texture beyond Pipeline’s odds. St. Louis shortstop JJ Wetherholt was declared the likely NL Rookie of the Year with Brendan Donovan's trade creating opportunity, while Jeff Passan flagged Pirates center fielder Edward Florentino as a breakout candidate, noting he “wound up stealing 35 bases in 83 games between the Florida Complex League and Low-A” and predicting a move into top-10 prospect conversation. A more whimsical prediction labeled Carlos Lagrange “this year's Cam Schlittler.”

For fans and front offices, the spring will resolve a set of high-stakes choices: accelerate a 19-year-old phenom into a developmental crucible, reward a pitching prospect ready to help immediately, or hold back to protect service time and long-term upside. Watch how clubs use big-league camp reps and early Grapefruit or Cactus League performances; those early impressions will determine who actually breaks camp and which organizations gamble on youth for immediate impact.