9U Baseball: Runner Goes Out of the Baseline—How Do You Coach It With One Ump?

A youth baseball coach describes a 9U play where a runner veered several steps out of the baseline to avoid a tag, but with only a plate umpire the runner was still ruled safe at second. The post asks how coaches should teach infielders to handle this situation without chasing runners and when (or whether) to expect an out-of-the-baseline call in one-ump games.