Leading off a game at Salt River Fields last week, Geraldo Perdomo took five fastballs, four of them wide of the strike zone, tossed his bat aside and trotted to first base. In his next trip to the plate, he took another fastball for a ball, then shot a curveball into center field for a single.
Perdomo, the Diamondbacks’ young shortstop prospect, recognizes offspeed stuff well.