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Pitch trajectory and Statcast data: Baseball Savant. Player metadata, schedule, and headshots: MLB Stats API and mlbstatic.com.

William Kempner (Miami Marlins) MLB Statcast data · PitchTracker

Outcome

Swinging strike
Called strike
Ball
Foul
In play

All pitches in 2026

Pitcher

William Kempner MLB Statcast data

RHP · MIA · debut 2026

Miami Marlins

Season

Arsenal

Four-Seam95.5 mph49% (98)
Sweeper81.7 mph23% (45)
Sinker94.0 mph14% (27)
Cutter87.4 mph12% (24)
Changeup

All pitches in 2026

86.8 mph

3% (5)

Pitch type

Outcome

At-bat result

Batter side

Game

Rendering 199 pitches