Ronald Rosario, a 20-year-old international free agent signed by the Mariners in 2013, finally made his state side debut in 2017. The Dominican born outfielder spent his first 3 season playing in the Dominican Summer League, where he showed steady growth every season.
Rosario made the jump to Everett after a short stint in the AZL, and showed real promise in 40 games with the Aqua Sox. During his stint with the Mariners Low-A affiliate, Rosario hit .294/.355/.516, with 6 homers, 6 doubles, and 2 triples in 182 at bats.
The high slugging percentage is encouraging, as power is the biggest question in Rosario’s game.