Age matters up to 23 or so, because players continue to physically mature.
After that, it's a proxy for experience, for hitters, basically # of college/pro PA is a better measure.
Kemp, college 548, summer 277, minors 1315, AFL 63 = 2193
Crawford 1391
Anthony college 443, summer 87, minors 844 = 1374
Rincones college 620, summer 82, minors 1218, AFL 191 = 2111
Rojas Minors 1959, AFL 52, MLB 750 = 2761
Ricketts college 622, summer 192, minors 893, AFL 53 = 1760
Reyes minors 1280
Miller minors 955
DeMartini college 752, summer 214, minors 552 = 1518
Escobar 860