I should state that this is fastpitch...........
....and it is still the incorrect ruling.
This is an old "playground rule myth" that, unfortunately, rears it's ugly head season after season. Well, it's a little bit unfortunate when a player, coach or spectator believes this old myth. But it's
really unfortunate when the one person on the field who is supposed to know the rule blows it!
Like most rule myths, there might be a tiny kernel of truth behind it, but the rule is being misinterpreted in some way. It is prohibited for a coach, or anyone other than another runner, to assist a runner during a live ball. Somewhere along the line, those not familiar with the actual rule have took this to mean that no one may EVER touch a runner. That simply isn't the case and isn't the correct application of the rule.
For starters, on a home run the ball is dead. Remember, coaches or non-runners are prohibited from assisting runners
during a live ball.
Secondly, the coach or non-runner must actually do something that assists or aids the runner in running the bases. Examples would be helping up a runner who has fallen, pushing the runner toward a base, or grabbing a runner to stop them from advancing. A congratulatory slap generally isn't going to fall under the definition of assisting the runner.
The list of rule myths is a long one and this one is probably near the top. I can remember a few dust ups over this rule all the way back to when I played youth baseball and that was a
looong time ago!