The 2011 first rounder is hitting .271/.394/.428 with 25 extra-base hits, 41 walks against 70 strikeouts in a league that averages .246/.319/.346. While playing as young for the NYP, he is second in doubles, tied for third in extra-base hits and tied for first in walks. The only negative: he's third in strikeouts.
Baseball Prospectus' Jason Parks was impressed:
An o-for-3 on Sunday, snapped fellow 19-year old SS Philip Evans' six-game hitting streak. He's sitting at .246/.329/.340 for the year with a solid 40/29 K/BB ratio in 64 games but, despite a pull-heavy approach, lacks the in-game power of Nimmo.
Saturday: Hansel Robles in an 11-0 win at home versus Staten Island: 7 IP, 3 H, 0 R, 0 ER, 1 BB, 8 K - 1.20 ERA
Sunday: RHP Julian Hilario in a 12-2 loss at Staten Island: .1 IP, 8 H, 7 R, 5 ER, 0 BB, 0 K - 3.65 ERA
All three 22-year olds have had very good seasons, but of this trio I'll take Mateo, who has the best fastball, the best build (6'3" to 6'1" for Hilario and 5'11" for Robles) highest strikeout rate, and the best K/BB.