Practice balls are USGA conforming products that differ only due to a cosmetic blemish such as paint, ink or registration of stamping. The golf balls all have “Practice” stamped on the side but do not have any construction or performance deficiencies.
WHAT’S THE RULING?
You may be wondering the rule on putting a practice ball in play. In compliance with The Rules of Golf, all golf balls on the USGA conforming list may be used in a casual round of golf – including those where scores are posted for handicaps – and during competition. Thus,Practice balls can be used during any round of golf. Refer to rule 4.2a(1)/2 for more info.