One Ball Rule

A tournament regulation requiring all players to use the same model and type of golf ball throughout the entire competition, ensuring equipment equity and eliminating potential advantages from ball selection. The one-ball rule prevents players from switching between different ball types during a round to optimize performance for specific shots or conditions. This rule is common in professional tournaments and serious amateur competitions to maintain competitive integrity. Players must declare their ball choice before competition begins and use only that ball model throughout the event. Understanding equipment rules helps ensure compliance and fair competition.