This one is probably easier than some we've done, though there were a few towards the bottom whom I really don't remember at all. Last names only needed, as usual - but you'll probably spend as long trying to remember how to spell the surname of our current backup catcher as actually remember any other player!
Your Saturday Sporcle: Men in the Iron Mask
20 players have started at least one game behind the plate for the Arizona Diamondbacks. How many of them can you remember?