Madison Bumgarner of the San Francisco Giants pitched poorly Tuesday night, giving up nine hits to the ten batters he faced. The problem came from a lack of differentiation between his fastball and slider. During this season, through June 15th, Bumgarner showed a difference between the pitches in three dimensions:
Madison's fastball tends to stay up in the zone, while is slider dips and moves father in on a right-handed batter. On Tuesday night, both pitches flattened out:
The fastball wasn't staying up in the zone as much as usual, taking away much of the difference between that pitch and the slider. The fastball was also moving in more than usual, lowering that difference as well. With both pitches coming in flat, Twins batters hammered them for eight of the nine hits, five doubles and three singles.