I don't care about what MLEs, ZiPS, or PECOTA project a player's final line to be. I cancelled my subscription to BP a long time ago when I realized that baseball statisticians basically measure the result and yet it treat like it's the cause, and I went more scouting orientated with BA. See BABIP, FIP, xFIP, PAP, etc... it's all the same backwards analysis treating the effect like it's the cause... his BABIP is too high, he's going to regress to mean! Well no kidding, what MLB player produces at a constant rate over the course of an entire 162 game season? Essentially what's being said is he's been really hot and he's going to cool down. Shocking insight... or pitchers who are giving more runs than normal... his BABIP is too high so he's unlucky! No, he's pitched like garbage and has been getting hit hard, there's a difference between poor performance(which is usually poor pitch location) and being unlucky. Cause and effect has been turned completely on it's head... thank goodness pitchfx came around on the pitching side, but we still lose the context of the pitch which makes it's statistically difficult to quantify location. However it's much more sound analysis than FIP or xFIP. I share your skepticism of MLE's, as they have not not done a very good job at predicting future performance (it's been tested). PAP appears to not have any real value as well (it's been tested). The rest of that reads as one long, uniformed rant. You seem to be suggesting that no metrics have never been tested for their level of ability to predict future performance. Like people just make up stuff and no one ever tried to quantify their value? And your continued suggestion that BABIP correlated 100% to a pitcher's performance is illogical as well. If you really know about pitch f/x you would see it backs that up. A perfect pitch still can get hard and a bad one can result in a pop up. Is that really a hard sell? And then when you include the effects good or bad defense can have... You just seem so emotionally invested in your current views of baseball that there's really no sense in debating it on a public forum. If you have any interest in having your views challenged, I can point you to dozens of studies.