RSI's branded infield dirt, AMP Infield Mix, is a custom blended baseball clay designed to perform at any level of play.
Baseball/Softball Infield Modification
Pro Player Explains Key Differences in Softball vs Baseball
For Opening Day, Baseball Is Racing to Perfectthe Infield Dirt - WSJ
Why Western Pennsylvania dirt is used in the infields of most MLB stadiums
Red Infield Conditioner - C & H Baseball
The Different Dirt Surfaces Used in MLB Stadium Infields
InfieldMixMobile
Infield Dirt for Baseball Clay and Softball
Baseball Field Top Dressing
Scarifying the Infield Skin - Groundskeeper University
Infield dirt hi-res stock photography and images - Page 2 - Alamy
This Pennsylvania Dirt Farm Supplies Infield Mix for 86% of MLB
MATERIALS SportsFieldSolutions