Counter examples don't make it right. Should I list all the players who started off looking promising, had a hiccup and never recovered? There are more of those, btw, they're just less memorable. How many of them were as talented/touted and successful as Castro? And at what ages? Not a perfect comp and injuries had something to do with it, but this is one I never liked seeing on Castro's otherwise amazing comp lists: http://www.baseball-reference.com/players/t/templga01.shtml Any struggles can be directly attributed to the excessive use of 'r' in his first name. Or the excessive use of coke in his free time.