2025 in-season top 100 MLB prospects update: A new No. 1 - ESPN

A lot has changed since the last time we ranked the top MLB prospects.

The MLB draft and breakout seasons have added new names to our list, replacing players who have graduated or regressed in 2025 — and some of the prospects in our ranking are in different places after a busy trade deadline in the majors.

All of that movement makes this the perfect time for an updated ranking of the top players in the sport — along with some of the biggest risers of the season — heading into the final weeks of the minor league season.

This is my ranking of these players for the long term, considering their upside, risk and proximity to the big leagues, in consultation with scouts and execs around the league. Here's more on the grading tiers and lingo I use. Players in the big leagues are eligible for this update (MLB rookie eligibility rules apply here — 130 at-bats, 50 innings pitched or 45 days on the active roster) so you will see some recently called up major leaguers.

Now let's get to my final 2025 ranking of the best young prospects in baseball.

1. Konnor Griffin, SS, Pittsburgh Pirates

It has been an improbable rise for the No. 9 pick in the 2024 MLB draft, going from being a high school hitter with big questions about his swing to ranking as the top prospect in the game in roughly 12 months.

I compared Griffin's upside to Fernando Tatis Jr. at draft time and he's following that plan, but with even better early reports on his shortstop defense and patience. Griffin is a plus-plus runner and thrower who can be average to above defensively almost anywhere on the field and has 30-homer upside, especially if he can lift the ball a bit more.

With some performance in Double-A (he was just promoted to the level), he will move into the