Sorry for the length, but bare with me The reason I like metrics/advanced stats is because it helps me rate players against players at the same position. Whether one wants to wrestle with the pin-point accuracy of it (like did he really save 20 runs could it have been more like 15), I feel they have a good grasp of being able to do that, because even if there’s subjectivity in it (and how much subjectivity is debatable), it’s at least applied evenly across the board. Let’s look at defense as an example. I like to use four categories when talking about how a player plays defense. He’s great, he’s good, he’s bad and he’s horrible. Now, I feel I have a good enough eye to at least go that far. I played at a pretty competitive level, and I’ve always watched a good chunk of baseball, so I feel pretty comfortable in that. What I don’t do is watch all of the games of all the teams with the sole purposes of evaluating players defense like the people who do the metrics. No one fan can do that because none of us watch enough games of other teams and when we do watch other teams, it’s certainly not with the sole purpose of evaluating the defensive ability of every player on the field and comparing against their positional peers. So, I may be comfortable in my belief that Plouffe was a good defender last year (and, not shockingly, metrics backs that up), I don’t watch enough of every team play while focusing just on 3B play to see where he rated 1-30. Even if I magically could watch that many games, I certainly can’t be sure my bias wouldn’t show itself, as much as I’d like to think it wouldn’t. So that is why, for the purpose of ranking player’s abilities against their peers, I have no problems with looking to organizations that do it for a living. These people have been doing these things for years and years. For me, metrics get better and better but aren’t perfect. The SABR guys will even tell you that, including guys like Dave Cameron. I don’t know anyone who takes it for gospel to include the people who do them for a living. They continuously look for ways to improve. Heck, Fangraphs is adjusting its pitcher WAR next year to include inducing pop ups. Nobody is making them do that, they saw an issue and they openly admitted it and are fixing it. What I think is important to note that, while not perfect, it’s certainly better than any one person’s evaluation. Many detractors don’t seem to want to admit that. They talk about the issues with metric, but blow off the inherent problems with fan bias. I wouldn’t feel more comfortable saying something like ‘I bet player X great defense only saved 5 runs as opposed to 20 last year, or I bet he saved more than 20.’ I don’t look at every play of every team’s games and see how that non-strike call (or a strike 3 called when it should have been ball 4) ended up affecting a rally like the guys who do this do. I don’t see every play of every game to see how Juan Ligare’s unbelievable catch turned what would have been a bases clearing double into out #3. I think defense affects games way more than some believe and the really great defenders save a lot of runs, likely even more than metrics currently says (as speculated also by the people who do them). I do find it interesting how some fans and GMs use metrics in an argument that agree with their opinion but so easily toss it aside as hogwash when it doesn’t. If one always does that, there is literally no reason to ever reference them. Even better, is when people think they know how to use them when they don’t and then, because of that, find fault in them. And the best, is how they think certain traditional stats tell a much better picture, not admitting how badly these stats we grew up on really are at giving us a true evaluation of even the thing they are supposedly telling us about a player. These stats get a pass because they aren't new, they aren't a 'metric'.