Every home run record for the past 30 years should come with an asterisk. Today’s baseball players play in Little League stadiums. Have you seen the size of those behemoth stadiums from the old days? Almost 500 feet to the center field fence.
In some of them, such as the Polo Grounds -- where it was also 280' down the RF line.
But, then, some of the old stadiums were band boxes, too. Like Crosley Field in Cincinnati.
Fact is that, on average, the average dimensions of a baseball park have been pretty much the same over the years.