PBA in 2015 to adopt USBC rule that thumbless bowlers can’t have ‘thumb’ hole and weight hole

Back in early May, the United States Bowling Congress announced that it had modified its rules on bowling ball gripping holes so that bowlers who don’t use their thumb during a delivery cannot have both a “thumb” hole and a balance hole. I covered the complex topic in this blog. The change prompted numerous Facebook threads that delved into an astounding number of nuances that at times left me more confused than I was when the rule was announced. I won’t pretend to be ...