Oh sure they are. I mean, come on. Fun and competition don't require armor (aka padding/safety equipment) or weapons (aka sticks, bats, etc). Look at the terminology and strategy applied to sports: zones, points, guards, offense, defense, captains, forwards, checks, lines, etc, etc, etc. Sports are designed with warfare in mind. Squad level, organizational strategic combat simulation.

In the good old days they were a lot cooler, of course. Jousting, that mayan game where the losers were beheaded, gladiatorial contests, etc. We still have fencing and the martial arts, naturally, but everything's so pansied down.

Even some of the wussiest sports have their origins in war! Polo is obviously a calvalry training exercise, and lacrosse was used as wargaming by some of the Native American tribes.

So, yeah. Baseball. What's up with that?