A hearty welcome to you, Pivetta! I'd sort of thought that 'I had known' was correct, and the other a sloppy but common idiom. Apparently I was wrong.
Looked at your bio, Sweetie--you seem to have enough quirkiness to fit right in here! Re: your special interest, musick likes baseball pretty well, but you really ought to check in with AnnaStrophic and Faldage, for some real die-hard fan discussion. Just a suggestion.