It’s also important to know that as of January 1, 2018, USA Baseball implemented new bat requirements that impact 14-and-under youth leagues. That means that bats bearing the 1.15BPF stamp are no longer approved for use in these leagues; you must have a bat that is marked USA Baseball. Every product on Fatherly is independently selected by our editors, writers, and experts. If you click a link on our site and buy something, we may earn an affiliate commission.