Perhaps the evaluators gave less weight to Jarren Duran's Triple A numbers because of his extreme home/road splits:
Home: 112 AB, .304/.391/.679/1.070
Away: 132 AB, .220/.329/.379/.708
Playing nearly half of his games at Worcester's bandbox likely inflated his numbers.
wRC+ is a valuable statistic that, at the MLB level, is adjusted for league and park. However, at the minor league level, wRC+ is adjusted only for the league.
In a December comp of Duran and Seattle outfielder Taylor Trammell, one conclusion was that "Each enjoyed some success hitting at Triple A this year, although Duran had the edge" based on Duran's wRC+ of 132 and Trammell's wRC+ of 104.
https://www.talksox.com/forum/threads/18170-Should-Jackie-Bradley-Jr-be-traded?p=1446206&highlight=trammell#post1446206
Of course, those wRC+ were league-adjusted only, not park-adjusted. The pitcher-friendly Triple A East (International League) boosted Duran's wRC+ while the hitter-friendly Triple A West (Pacific Coast League) lowered Trammell's wRC+.
But wRC+ does not take into account that Tacoma's sea-level, heavy-air ballpark is among the pitcher-friendliest in the Triple A West. Trammell's home/road splits reflect the difference:
Home: 126 AB, .238/.331/.389/.720
Away: 148 AB, .284/.388/.514/.902
The discrepancy between the 2021 Triple A wRC+ of Duran and Trammell should have been less if the numbers had been park-adjusted.
Or not.