Looked it up because I was sure I heard this before. Brunswick house balls are indeed listed as being urethane [1]. I can say from experience that my polyester

Looked it up because I was sure I heard this before. Brunswick house balls are indeed listed as being urethane [1]. I can say from experience that my polyester ball is both less durable than a house ball and curves less than a house ball when thrown two handed. There are plenty of professionals that bowl two handed like that, including the most successful bowler of the past decade. It is a completely valid and accurate method to hook the ball a lot. [1] https://brunswickbowling.com/bowling-centers/equipment-parts-supplies/center-environment/house-balls/myball-house-balls https://brunswickbowling.com/bowling-centers/equipment-parts...