2019 JBO Official Rule book
Legal bats for JBO
There has been an ongoing certification of 'legal' bats in youth and collegiate baseball. This stems from the goal of safety for players and the integrity of the sport. The current rules state that every bat must be free from dents, deep groves, cracks and/or any 'custom' tampering with the bat. All bats must now also have, factory attached, either a "BPF 1.15/USSSA" or "BBCOR" decal, clearly visible. All other none wood bats, regardless of when purchased (or for how much) will NOT be allowed into the game.