How big are your boobs?
No seriously, it's a crapshoot trying to get autographs before games, I remember one time st the big O trying to get Moises Alou's autograph on a card, I finally waded through the masses and gave him my card, he commented on how cool the card was, but then noticed I didn't give him a pen to sign the damn thing, figured ball players walked around with Sharpies in their jocks.
Best way imho, is to send your cards to the Rogers Centre with self addressed stamped return postage with a couple of 20's thrown in for the clubbies, may take a couple months but you'll get your s*** signed, just be reasonable with the quantity of stuff you are sending