4. Julio Rodriguez - Seattle Mariners
It's been a tumultuous year for Julio Rodriguez, but that doesn't diminish his outlook as one of the MLB's future superstars. We saw the centerfielder crack the 30/30 list last year, but he hasn't come close to matching that effort in 2024. The glass half-full perspective is what makes J-Rod a progression candidate for next season, and he could join the MLB's most exclusive club.
Rodriguez sits in the upper tier of most analytics categories. The Seattle Mariners franchise cornerstone ranks in the 80th percentile or better in expected slugging percentage, average exit velocity, bat speed, and sprint speed. Still, he hasn't used his tool-set to his full potential this season.
J-Rod is operating 60 points below his expected slugging percentage and 100 points off his previous career best. Natural progression is inevitable, but if the Mariners loosen the reigns, Rodriguez could flourish and become the newest member of Shohei Ohtani's 50/50 club.