This isn't purely about which player is the better prospect, but about who played or pitched better in this admittedly arbitrary endpoints game. In cases of a tie, deference will be given to the player who improved his prospect stock more.
We'll start with AAA, work our way down and then do an overall organization Player and Pitcher of the month.
.301/.420/.554 9 2B, 4 HR, 16 BB, 22 K - 83 AB, 22 G.
Nieuwenhuis owned a 16 game hitting streak in April and led all Bisons with 10 games played or more in OBP and SLG.
The hole in his game remains his performance against lefties.
Thus far this year, he's crushed righties at a .365/.467/.714 rate in 63 AB and done only .240/.367/.280 versus southpaws in 25 AB.
RHP Chris Schwinden
1-0, 1.15 ERA, 3 GS, 15.2 IP, 11 H, 2 R, 2 ER, 6 BB, 17 K, Opp AVG: .196
He's not the prospect Mejia is, but he was great in his three starts for Buffalo.
1-2, 2.86 ERA, 5 GS, 28.1 IP, 16 H, 10 R, 9 ER, 14 BB, 21 K, Opp AVG: .168
-- Mejia started off very well, but his command showed no improvement as the month wore on, and he finished on a down note with his lowest strike percentage in his last start.
-- Also, Schwinden had him beat on K-rate, crazy as that is.