I'm( finally )playing center field.中的finally是什么意思?

I'm( finally )playing center field.中的finally是什么意思?这个一个完型阅读上的,全段为 I was very angry that they hadn’t asked my opinion.“What about my friends?” I shouted.“And baseball?I’m （finally） playing center field.I don’t want to move.”为什么要用finally?我终于打中锋了吗