Houston Astros
Although he has not seen a pitch in 2015, George Springer saw 1,449 pitches that were tracked by the PITCHf/x system between 2012 and 2014, including pitches seen in the MLB Regular Season and Spring Training.
In 2014:
Against All Fastballs (778 seen), he had an exceptionally good eye (1.43 d'; 77% swing rate at pitches in the zone vs. 24% swing rate at pitches out of the zone) and a steady approach at the plate (-0.01 c) with a disastrously high likelihood to swing and miss (37% whiff/swing).
Against Breaking Pitches (415 seen), he had a very good eye (1.03 d'; 73% swing rate at pitches in the zone vs. 34% swing rate at pitches out of the zone) and an aggressive approach at the plate (-0.09 c) with an exceptionally high likelihood to swing and miss (48% whiff/swing).
Against Offspeed Pitches (178 seen), he had a league average eye (1.03 d'; 76% swing rate at pitches in the zone vs. 37% swing rate at pitches out of the zone) and a steady approach at the plate (-0.19 c) with a high likelihood to swing and miss (44% whiff/swing).