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Mark Vientos, IF
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Scouting report
Vientos arrived at the Mets' alternate site in September, then played during Fall Instructional League, before being signed by Escogido in the Dominican Winter League (which also rostered Wander Franco, Vlad Jr., and Julio Rodríguez); he did some pre-season training with the team but didn't play. He's undergone a few minor swing changes since entering pro ball, and the latest iteration features a wider stance and toned-down leg kick, and is a close bedfellow to Spencer Torkelson's swing. Long-levered, corner-only prospects like Vientos are extremely risky, and the way his strikeout and walk rates trended in 2019 -- combined with the possibility that he might outgrow third base -- has led to some industry trepidation regarding his inclusion on the Top 100. But I like that he's been able to make swing adjustments, and Vientos also put up an above-average statline in full-season ball as a teenager and has some of the most exciting, frame-based power projection in all the minors. He torched balls in 2019, averaging just over 91 mph off the bat and putting 47% of them in play at 95 mph or above, which, for context, is a 65 on the scale. And he still has room for another 20 pounds on the frame. Proprietary metrics sourced for this list indicate that even though he only slugged .411 in 2019, his expected SLG based on the quality of his contact was closer to .480. I've seen Vientos get on top of elevated fastballs and drive stuff the other way with authority in a way that's uncommon for a hitter with levers this long. He's quite risky, but is also a potential middle-of-the-order anchor. (Alternate site, Fall Instructional League)