In grey beards defense, the bounty hunters crippled him in that game and he almost beat them single handedly anyways…. and AP wasn’t a lot of help either.….. that’s my rant , sorry
RBIs
RBI is an acronym, thus a noun: singular RBI, plural RBIs. If you want to say the words, say them, don't use the acronym. You would not use the plural for 'an RBI double' to say 'runs batted in double' meaning one run.