
- Who
- Aroldis Chapman
- What
- 105.1 mile(s) per hour
- Where
- United States (San Diego,PETCO Park)
- When
The fastest baseball pitch is 105.1 mph (169.14 km/h) and was thrown by Aroldis Chapman (Cuba) for the Cincinnati Reds in a game against the San Diego Padres, at PETCO Park, San Diego, California, USA, on 24 September 2010.