Wow. What a mess. I think what everybody expected with this new bat rule has happened. Umpires have no clue, 3/4 of the coaches have no clue, and the ones that do know what they are talking about get overruled because of ignorance. This really has little to do with the outcome of games but if there is a rule in place not just for TN but for the entire U.S. we should abide by it. Especially since it is about the safety of players. It's really not that hard if you have a computer and can use a mouse. There is a list of illegal composite bats and legal composite bats. All aluminum is legal. There are only 10 legal composite bats. If you can remember 10 bats then you know whats legal and whats not.
There are a couple more but these are the most common illegal bats: Demarini CF3, Easton Synergy, Easton Stealth, Reebok Vector, Nike Aero Fuse, Mattingly Beast, Combat Virus, Miken Freak, Miken Red Burn, and Miken MV.