Six years ago when I turned 18, I saw no advantage for me to stay in junior leagues. Very, very little scholarship money was available in local tournaments, I wasn't good enough to win anything outside of my local area, almost no colleges around me had bowling teams (heck, my high school only had one my junior year, and that was only because I did most of the work recruiting people for it), etc. I went up to adult leagues as soon as I was 18 and started winning jackpots, had more fun bowling against more than two or three other people at my talent level, etc. I don't regret it at all -- I hated the youth bowling stuff around me.