Question of curiosity: Why no lawsuit?

LCS. League Championship Series. That sounds familiar. Where have I heard that before...?

Ah yes! https://en.wikipedia.org/wiki/League_Championship_Series

Now I'm no baseball fan, but baseball is a much bigger deal internationally than League... and the WWF had to change its name when the World Wildlife Fund of all things sued them. So I have to wonder why the MLB hasn't sued yet? League's pro scene is evidently a big deal now. I hear fans, players and Rioters boasting about it all the time. How the sport has been legitimized. How the masses are being forced to recognize its gravitas. How it's a bigger deal than many traditional sports now. The "wave of the future", they say.

So I find it a bit curious that there's no lawsuit. If there were a lawsuit, I wonder what they'd change the name to?

(Interesting side note: For some reason, there's no alternate link or disambiguation page on the LCS Wikipedia page.)