This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
We are just about to go to a professional baseball game.
I like baseball, but I heard you have to act like you're in the army if you belong to the baseball club, so I don't want to join it.
I fractured my knee while playing baseball.