Legal/Illegal Composite Bats
I picked up an Easton bat over the summer for my daughter. I was very excited about seeing her hit with a composite bat. I see them used everywhere. She has loved her bat! Recently another father on her team told me about the benefits of "rolling" her bat. I did some quick research. I can't tell if "rolling" the bat would be illegal or not. I get the impression it is.
What are the rules on bats?