I think that for a player to genuinely (anything "official" doesn't necessarily means it's real or true) have the single-season home run record he must hit 61 home runs in 154 games or less because imagine if Ruth had played for the eight extra games (162 games) he could've had more than 60 and Roger Maris would not have been able to pass the Babe.

As for McGwire and Sosa, those guys were phony and I'm sure that without the help of steroids they would not have hit as many home run as they did.