In 2021 between AA and AAA, Kwan had a 154 wRC+ with a 10.6% BB-rate, 9.1% K-rate, .199 ISO, and a .335 BABIP. In 2022 between A+ and AAA, Frelick had a 137 wRC+ with a 9.3% BB-rate, 11.2% K-rate, .148 ISO, and a .361 BABIP.
Kwan was a better version of Frelick in the minors and didn’t reach an .880 OPS as a rookie despite over performing his xwOBA by 29 points.
Not to mention the Brewers also play in one of the least ball in play friendly parks in the MLB because of its small dimensions. In statcast’s 3-year rolling park factors, AmFam is 6% below average in singles, 8% below average in doubles, and 4% below average in triples.