Rookie hazing in MLB has been around for more than a century, although it wasn't always as sweet and innocent as it has become these days.
Back in the early years of MLB, hazing was conducted in a much more physical manner. Today, it's more along the lines of dressing up like women or wearing silly costumes.
Hazing is a ritual in sports and—although the violence is gone—it can still be fun for both parties (Yes, I did mean that to an extent, an old-fashioned butt-whooping can be fun for both sides—at least it was in the Marine Corps.).
Here is a list of some of the craziest (and funniest) rookie hazings in MLB history.