Brewers Video
It's widely agreed that the Milwaukee Brewers have the best farm system in baseball right now. When you have as many high-profile prospects as the Brewers do, you’re bound to have some players getting overshadowed.
If you're a frequent reader of Brewer Fanatic, you may know him, but many have yet to become acquainted with Brewers farmhand and second baseman Josh Adamczewski. That may be because he’s the 13th-ranked Brewers prospect on MLB Pipeline, and he wasn’t on any sites’ radars until this season.
Don’t get me wrong, it’s understandable that the 20-year-old was unranked in 2024, as he was a 15th-round high-school draft pick from the year before—who had zero hits in just seven at-bats in 2023. Since then, however, the lefty has gone 124-for-363 (.342) across Rookie ball, Low-A, and now High-A after his recent promotion. In 455 career plate appearances, Adamczewski has 33 doubles, 5 triples, and 8 home runs, with a .335/.447/.516 line.
Since the start of 2024, Adamczewski owns the third-highest batting average in the minor leagues (min. 400 PA). For context, that’s third out of 1,518 players across all levels of the minors. Further, as of today, he is tops overall (out of that same field of 1,518) in OBP, and second in wRC+ at 169.
Like most lefties, Adamczewski appears to be more comfortable hitting right-handed pitching. Since the start of 2024, against righties, the lefty has an OPS north of 1.000, with nearly as many walks (60) as total strikeouts (64). To be clear, Adamczewski is also hitting lefties in a (very) small sample this year, slashing .349/.417/.512 in just 48 trips, albeit with a much more typical 12 punchouts and just four walks.
It likely hasn’t been the youngster’s dream season, however, as he was sidelined for two months with a back injury, and he rehabbed in rookie ball in early July. Upon his mid-July return to Low-A, Adamczewski slashed .359/.468/.603 across 95 PA, with more walks (15) than strikeouts (12). This brought his Low-A OPS to 1.027 on the year, in a league with an average OPS of .664.
Naturally, Adamczewski was promoted at that point, heading to High-A Wisconsin just last week. There, he rejoined his similarly promoted (but more acclaimed) infield teammates, Luis Pena and Jesus Made.
But why is Adamczewski so unheralded, versus those peers? For starters, it’s important to remember that the 15th-rounder had fewer than 200 PA after 2024. Additionally, he is viewed as a below-average defender at second base, the only defensive position he has manned thus far in his professional career.
Still, in their writeup on the top 45 Brewers Prospects for 2025, Eric Longenhagen and James Fegan touted Adamczewski's exit velocity and bat speed, and called an "Eric Thames sort of offensive production" a “reasonable expectation" for Adamczewski. To save you a Google, Thames finished his career with a slash line of .241/.325/.467, with a 108 OPS+. That type of production, if he can stick at the keystone, would likely keep Adamczewski in the majors for a long time.
If you're curious how a hitter with a .335 career batting average might be projected to hit .240 in the majors, Adamczewski does have an almost unbelievably high career batting average on balls in play or BABIP, at .413. Keeping in mind that Adamczewski still has fewer than 500 career PA, his BABIP should be expected to drop significantly as his career continues. After all, over the last 5 seasons, just the top 7% of hitters over that time even have a BABIP north of .330.
Adamczewski additionally has around a 73% contact rate on swings in 2025, which is not quite to the level of elite contact you would expect from a player who may hit for a high average all the way up to the top flight. At the same time, the young lefty is just 20 years old, and can be expected to tap into more power as he grows. In fact, he has already tweaked his approach as a pro, with MLB.com reporting that for 2025, Adamczewski "lowered his hands in his stance some, allowing him to meet the ball on plane more easily."
This has led to a huge drop in ground ball rate for the lefty, down to around 40% from nearly 52% last year. While the usual small sample size warnings apply, that is a massive shift in batted-ball profile, all while maintaining one of the highest averages in pro baseball.
And while no prospect is a sure thing, it’s fair to expect Adamczewski's under-the-radar status to shatter soon. He's too talented a hitter not to talk about.
All stats as of Aug. 25, 2025.
Interested in learning more about the Milwaukee Brewers' top prospects? Check out our comprehensive top prospects list that includes up-to-date stats, articles and videos about every prospect, scouting reports, and more!
View Brewers Top ProspectsFollow Brewer Fanatic For Milwaukee Brewers News & Analysis
-
5
-
1







Recommended Comments
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now