Does a pitcher's foot still have to be on the rubber when releasing the ball? If so, how can Carter Capps pitching be legal?
Pitching Mound Forming Systems - Sportsfield Specialties
MLB experimenting with moving back pitcher's mound as part of Atlantic League rule changes - CBSSports.com
the joy of sox: MLB To Test Moving Mound Back 12 Inches In The Independent Atlantic League This Summer); A "Double-Hook" DH Rule (Lose The DH When You Pull Your Starter) Will
Pitcher's Mound & Field Dimensions - UmpireBible
Legal Pitching Positions - UmpireBible
New rules could drastically alter look, length of MLB games - The San Diego Union-Tribune
Basic Mound Specifications | Turface Athletics
Legal Pitching Positions - UmpireBible
2020 New Softball Pitching Rule Changes - Amanda Scarborough