I got my start doing 8U coach pitch at 17, which was also the same summer I got asked to work some adult men's beer league games. The 8U games were harder, because I had to keep track of when a batter had 10 pitches from the coach before we brought out the tee, in addition to calling the plays on the bases. The beer league guys...well, let's just say there was an additional illicit game fee in my truck after the game.

On another note, I've seen 12 year olds work soccer for the kids around the age of 5 and 6, so hearing that there's two 15 year olds doing 6U ball isn't too surprising to me. Although, I'm SHOCKED there were two umpires for 6U. I did basically anything 12U and under in my hometown, baseball and softball, by myself a strong majority of the time.