i'd love to hear how you came up with that Nate Silver Through my highly scientific, proprietary projection system called KJRMWAG. It works around the basic assumption that the speed with which the average prospect in his 20s improves per year will lag slightly behind the speed with which the competition improves at a one-promotion-per-year pace. So I take a guy like Vizcaino, and in AA he's basically: 20.5%, 6.5% BB, 15 HR/year, .315 BABIP., so in the majors, I expect something like: 22% K, 5% BB, 10 HR/year, .290 BABIP Then I calculate that out per 600 PAs: 132 K 30 BB 10 HR 428 BIP 124 BIPhits Then for non-HR XBH, he's got 28% of his BIPhits as XBHs at roughly 10 2bs for every 3b. So I gave him 28 2bs and 3 3bs for his 124 BIP hits. Then you add all that up into a slash line. It's a WAG, but I find it to be a fun exercise.