It's not news, did someone besides AsburyJohn say that it was? (See above:o) No question that baseball is the small man's game of the 4 major sports. Nutrition, training regimens and a good genetic infusion has done exactly what you said to change that stereotype to 6'3"/230#s. But you made it sound like it was DiMaggio and Williams and that was pretty much the extent of the outliers to your thesis, when it wasn't the case- it's pretty clear that size still played a part as a data point for predicting potential overperformance for slugging types of hitters, even when the average baseball player was significantly shorter than he is today. Highest MLB Career SLG and 6'2" or over for those whose careers began by 1914-1958: 1)Ruth 2)Williams 6)Greenberg 10)DiMaggio 16)Johnny Mize 27)Ralph Kiner 45)Babe Herman 51)Willie Stargell 57)Wally Berger 58)Hal Trosky #1, #2 SLG spots all-time, 3 of the top 6 spots, 4 of the top 10, 10 of the top 58. Definite large over-representation sample relative to the average height player of the era. Highest Career SLG and 6'0" or under whose careers began by 1914-1958 3)Gehrig 4)Foxx 11)Hornsby 18)Musial 20)Mays 21)Mantle 23)Aaron 31)Hack Wilson 33)Chuck Klein 35)Duke Snider 40)Al Simmons 44)Mel Ott 48)Ken Williams 13 of the top 48 in SLG all-time, but only 2 of the top 10. "I stopped there...." The over-representation of taller players, especially relative to the average-sized baseball player of the era, continues as the all-time SLG list progresses (and the career OPS+ list is similarly proportioned). You also had to hedge your list up to 6'1" to pump up that number from your original characterization that most every "Beasty" guy in baseball was 5'11" or 6', which technically removes Banks, Matthews,.....etc. Bottom-line, all other things being equal, it makes sense for KLAW to factor in height in his analysis for potential ceilings for both pitchers and hitters. I'm sure he's well aware of the Pedro Martinez and Kirby Puckett factor and takes that into account that more diminutive types are also fully capable of accomplishing great things on the diamond.