The suggestion is that two balls are required to participate in racing as a sport pistonheads should know better than anyone golf football and baseball well theyre uniball sports rightt shirt design reads racing because golf football and baseball only require one ball anonymousour crew neck short sleeved mens t shirts are 100 premium cotton in a soft pre shrunk jersey knit our womens t shirts are lighter weight 150g tees made with deluxe 30s soft style yarns for a soft feel