leaving base early
OK, I know a runner is not allowed to leave the base early(before the ball leaves the pitcher's hand), but who is supposed to call this?? The umpire or opposing coach? AND how is it decided, before the review rule went into effect?? IF it is the umpire's responsibility, why do they not call it before the opposing coach?? NOW the teams have to challenge any thing the umpires miss, BUT can only do it 2 times each game. WHY don't the umpires do their job if there is a rule against it?? I might mention that I was an umpire for several years, but not professionally. I'm 83 now, so most of these rules came AFTER I was calling games. IF it is a rule, it is the upire's job to make the call, not the coaches'!