I am really tired of sportscasters saying that a batter had two (or more) RBIs in a single game. RBI stands for Run Batted In. If a player doubles two runners home, they had two runs batted in. Thus they had two RBI -- NOT two RBIs. They did not have two Runs Batted Ins.
I realize this is a weird plural, like geese or radii, but it's your *@^# job people! I also realize that some dictionaries say it's acceptable to say RBIs. In my mind it's like wearing a Skoal t-shirt and baseball hat to church on Sunday. Just because society has deemed it allowable doesn't mean it's right.