Well, this just makes me miss Deadwood all the more: It seems that raunchy language was such a problem in professional baseball in the late 1800s, that the league actually handed out a document telling players to knock it off. It lists several examples of banned expressions, which are absolutely filthy, to say the least. (Language not safe for work, children, or small pets):
Such brutal language as "You cock-sucking son of a bitch!" "You prick eating bastard!" "... "Kiss my ass, you son of a bitch!" "A dog must have fucked your mother when she made you!" "I'll make you suck my ass!" ... and many other revolting terms are used by a limited number of players to intimidate umpires and opposing players. ... Whether it be the language quoted above, or some other indecent and infamous invention of depravity, the League is pledged to remove it from the ball field.
First, I love the fact that in 1897, you could tell an umpire "I'll make you suck my ass!" with complete impunity. Other than that, Tommy Lasorda wonders what all the fuss was about.
19th Century Ballplayers Uncensored [100 Percent Injury Rate]
Can We Even Run This? 1898 Obscene Language Baseball Document - Not For Kids! [Robert Edward Auctions]