A. Great question. A "Canseco" type play where a fair ball hits off an outfielder and goes over the homerun fence in fair territory is known as a four base award and not a homerun. The way the rule book describes it is " any fair fly ball touched by a defensive player that clears the fence in fair territory should be declared a four base award, or some people say four base error, and shall not be included in the total of over the fence homeruns".

So whether its is a homerun league or not in this situation the umpire would call  a four base award and the batter and anyone on base before him would score and it would count. Thanks, I hope this answers your question.

Keep those questions coming.

Gino the Umpire