I am not talking about one season for any of these pitchers. I'm talking about a career of work that earns them the title of ace. I am also not talking about the "feel" said pitcher has. I'm talking about the confidence we as fans feel for these players in given situations. As for FIP (I had to look it up as I never saw it before) it still doesn't explain when a pitcher was dominating, when he blew a lead or when he gave up a key home run. These are observation based and not statistically based. A pitcher giving up 3 runs in 7 innings isn't bad, but was that a 3-2 game or a 9-3 game? One more point I wanted to make and then I will drop this as it's clear we all have our own strong opinions on this. ESPN News posted a list of the pitchers with the most wins since 2005 and they are Webb (66), Beckett (62), Santana (61), Oswalt (60), Sabathia (60), and Zambrano (60). Sheets has 39. I know wins are not an entirely accurate way to establish a pitchers value, but they are very important. There are years where a pitcher will run into bad luck with no run support or poor defense, but there are also years where they get some good luck, as in baseball, things tend to even out. No one can try and tell me any of these pitchers just had good luck to get them these victories, and no one can say any of these pitchers has not proved himself to be one of the top pitchers in the league during his career. They are all ace pitchers and ace pitchers win. Ben Sheets does not win enough to be an ace and, therefore, does not belong in the same category. True, some of it has been poor run support, but the pitchers listed above have also had stretches of bad luck as well. It's also been injuries, but I consider durability to be a factor in who is an ace pitcher, not just who has great "stuff" (which Sheets certainly does). Sheets barely has a winning record in his career and much of that, I believe, rests on Sheets.