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. Started out as a top 5 player at their position for two years, had a hiccup where they were only slightly above average at their position, and the never recovered? At a position like SS? Garry Templeton is the closest example I can think of, and even he was productive for 5-7 years before dropping off. Edgar Renteria had a fairly short period of being near the best at his position as well, but it was never so early on in his career. 1) If you are going to limit the examples to those particular criteria, there won't be a lot of people to list on either side of the argument. 2) For the love of repetition, I'm not saying Castro is going to go into the toilet next year. I'm still saying he's going to be a really good player throughout his prime. I think that's the main sticking point; that you're talking about him like this year has all but locked him in to "only" being "really good."