9 Sleeper Pitching Prospects To Know

Plus: Underrated transfer portal classes, Fall League analysis & more

September 12, 2025

9 Sleepers With Impressive Stuff+ Scores

With the 2025 season wrapping up, we can begin to look back on the past five-plus months of minor league games and draw some conclusions. The sample size of data available is now standardized, allowing us to view certain metrics with a greater degree of confidence.

One such tool we use when identifying potential breakout candidates is our propriety internal Stuff+ metric, which is based on sourced minor league data. Using this metric, Geoff Pontes has combed 2025 numbers to compile a list of nine need-to-know sleeper pitching prospects whose normalized Stuff+ scores are worth monitoring.

Want even more 2025 data darlings? Check out some of our recent stories:

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NCAA TRANSFER PORTAL

10 Underrated Transfer Portal Classes For 2026

Following last week’s piece analyzing the top 10 newcomer classes, we’re taking a look at 10 portal classes that are flying under the radar.

While reading, it’s important to keep in mind that “underrated” does not necessarily apply to the school itself. A few of the programs discussed are household names, yet their respective transfer classes—which could be the final piece to their Omaha puzzle—are perhaps being overlooked due to the fact that they fall into the “quality over quantity” bucket.

All in all, these 10 classes feature some intriguing names to know as programs look to gear up for postseason runs in 2026.

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ARIZONA FALL LEAGUE

Youngest Players, Rule 5 Decisions In The AFL

Earlier this week, we covered the official unveiling of Arizona Fall League rosters, which are dotted with plenty of talented prospects from all 30 organizations. Now, Josh Norris and J.J. Cooper are back with more AFL analysis from two new and intriguing angles:

For complete coverage, be sure to check out our 2025 AFL home page, featuring rosters, schedules, streaming info and analysis of the top prospect names headed to the desert this fall.

WORLD BASEBALL CLASSIC

Ideal WBC Rosters For The DR, Venezuela & More

The World Baseball Classic will return in 2026 with the best teams from around the world coming together to see if they can end Japan’s international dominance.

But another excellent question heading into next year is whether a Latin American team can once again reign as WBC champs.

To help answer that, we’re taking a closer look at the Latin American powers with an eye toward how their rosters could shape up for next spring’s World Baseball Classic.