Credits

This game was created and coded by Joshua DeGrasse-Baumann. It was created with HTML, CSS, and JavaScript. You can learn more about the design process on Josh's blog.

Josh would like to provide special thanks to the following people for beta testing his code and for their support during the process:

• Casey Emanuel
• Sam Savaglio
• Aquent Gymnasium (for their great JavaScript Foundations course)

The odds in this game are based on 2025 Major League Baseball averages, courtesy of Baseball Savant, FanGraphs, Baseball-Reference.com, StatMuse, and others. The full list of sources says which numbers are published and which are estimates. They are great resources for stats nerds. Seriously, check them out.

Fun facts:

• There were 710,084 pitches thrown in 2025.
• For any given pitch (both in the 2025 MLB season and in this game), players had a 0.27% chance of being hit by a pitch.
• The record for the longest at-bat is 21 pitches, set by Brandon Belt against Jaime Barría on April 22, 2018. It took nearly 13 minutes.
• The average MLB plate appearance lasts 3.9 pitches.