Chadwick ID: d576ed18
Stay up to date this MLB Season with the daily Baseball Reference Newsletter.
Gyasi Mattison
Bats: Unknown • Throws: Unknown
School: Santa Rosa Junior College (Santa Rosa, CA)
Full Name: Gyasi Mattison
View Player Info from the B-R Bullpen
FAQs, Tip & Tricks
All logos are the trademark & property of their owners and not Sports Reference LLC. We present them here for purely educational purposes. Our reasoning for presenting offensive logos.
Logos were compiled by the amazing SportsLogos.net.
Copyright © 2000-2024 Sports Reference LLC. All rights reserved.
The SPORTS REFERENCE, STATHEAD, IMMACULATE GRID, and IMMACULATE FOOTY trademarks are owned exclusively by Sports Reference LLC. Use without license or authorization is expressly prohibited.
Much of the play-by-play, game results, and transaction information both shown and used to create certain data sets was obtained free of charge from and is copyrighted by RetroSheet.
Win Expectancy, Run Expectancy, and Leverage Index calculations provided by Tom Tango of InsideTheBook.com, and co-author of The Book: Playing the Percentages in Baseball.
Total Zone Rating and initial framework for Wins above Replacement calculations provided by Sean Smith.
Full-year historical Major League statistics provided by Pete Palmer and Gary Gillette of Hidden Game Sports.
Some defensive statistics Copyright © Sports Info Solutions, 2010-2024.
Some high school data is courtesy David McWater.
Many historical player head shots courtesy of David Davis. Many thanks to him. All images are property the copyright holder and are displayed here for informational purposes only.
Data Provided By
the official stats partner of the NBA, NHL and MLB.
- Sports Reference ®
- Baseball
- Football (college)
- Basketball (college)
- Hockey
- Football
- Blog
- Stathead ®
- Immaculate Grid ®
About •
Conditions & Terms of Service •
Advertise With Us
•
Jobs at SR
Sports Reference Purpose: We will be the trusted source of information and tools that inspire and empower users to enjoy, understand, and share the sports they love.
Privacy Policy • Gambling Revenue Policy • Accessibility Policy • Use of Data
Sports Reference Purpose: We will be the trusted source of information and tools that inspire and empower users to enjoy, understand, and share the sports they love.
Privacy Policy • Gambling Revenue Policy • Accessibility Policy • Use of Data
Player News