Ronald Rosario

Organization Prospect Rankings

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  Ranked Seattle Mariners #29 prospect in 2018
  Rosario finally made it stateside in 2017 after three seasons in the Dominican Summer League. He originally signed in 2013 for $350,000, and early scouting reports had him as light on game skills but with tantalizing tools. Four years later that's still the case with Rosario. He spent the early part of the season in the Arizona League before moving to short-season Everett after the trade that sent Brayan Hernandez to the Marlins. Rosario has some bat speed and makes hard contact, pulling balls on the inner half, but his actions at the plate are still very raw and he needs to learn to use all fields. He also needs to add strength to his lean, high-waisted frame. Rosario put up good numbers in the Northwest League, batting .275/.327/.478 with six home runs in 126 at-bats, but also had a 30 percent strikeout rate. He's got slightly above-average speed and can run down balls in the outfield, but is still a bit uncoordinated. Rosario's best tool is his plus-plus arm. Rosario is still a lottery ticket, but the Mariners may have something if he gets stronger and learns to tap into his intriguing toolset.