I am wondering myself. It is like when Sosa was caught using a corked bat, he claimed it was a mistake because it was in the dugout to use in practice. Of course, everyone knew it was ********.
I wonder if it was truly an illegal bat or if Cohen was just not going to argue it. I assume to be legal it must have some type of stamp or label on it. Hell my 9 year old's softball league requires that the bat is stamped or labeled as an approved bat.
Be interesting to see if Marcello follows up on the mysterious bat.