c. Yomiuri Giants
Oh hit his 756th home run on Sept. 3, 1977, surpassing the Major League record set by Hank Aaron. By the time his career was done, Oh's record stood at 868.
Just like Babe Ruth, Oh started his career as a pitcher and made the switch to hitting.
He also holds the record in Japan for most home runs in a single season at 55. And it's pretty clear he doesn't want to see it get broken. After his playing career was over, he became a manager. Whenever his teams went up against someone with a shot of breaking his record, his pitchers would intentionally walk them rather than giving them anything to hit.