The Mets have added a quartet of players to their 40-man roster tweets Tim Healey of Newsday. The Mets players being added to the roster, and thus being protected from the impending Rule 5 draft, are shortstop Ronny Mauricio, infielder/outfielder Mark Vientos, and right-handed pitchers Jose Butto and Adam Oller. The Mets now have 36 players on their roster.
Mauricio has appeared among Baseball America’s top 100 overall prospects in each of the past three years. The switch-hitter’s best attribute is his big power from both sides of the plate, but Mauricio has moved fairly slowly up the minor league ladder. He’s posted subpar strikeout and walk numbers, and he’s coming off just a .242/.290/.449 showing over 420 High-A plate appearances. Still, Mauricio boasts a rare level of power for a player projected to stick on the infield.
Vientos is a former second-rounder who mashed at a .281/.346/.580 clip with 22 homers over 306 Double-A plate appearances. He struck out at an alarming 28.4% clip and isn’t particularly well-regarded defensively, but those numbers highlight massive raw power that has made him an intriguing prospect for years. BA slots him fourth among New York farmhands.
Butto and Oller are both coming off strong high minors campaigns. The former, whom BA named the Mets’ #13 prospect entering 2021, worked 40 1/3 innings of 3.12 ERA ball over his first eight Double-A starts. Oller, 27, is older than most prospects, but he earns a roster spot after tossing 120 frames of 3.45 ERA ball between Double-A and Triple-A this past season.