From John Sickels' career retrospective on Helton: "Here�s the irony of Coors Field: It undoubtedly helped players put up ENORMOUS numbers. And at exactly the same time, it undoubtedly made those numbers look like mirages. . .you get the sense that if (Helton) had put up significantly WORSE numbers but played his whole career somewhere else, his career might be valued higher." With the proper statistical adjustments, we can work around the Coors issue. Using the "normalizing" tool at Baseball Reference, Helton would have hit something on the order of .292/.387/.496 with approximately 323 home runs* in a neutral park/league environment, still impressive in historical terms. Also keep in mind that WAR adjusts for park effect. His career WAR of 55.7 puts him in the neighborhood with first baseman like John Olerud (57.7), Fred McGriff (57.2), Bill Terry (57.0), Norm Cash (54.6), and Will Clark (52.0). As for the minor league comps, Mark Grace checks in at 45.7, Don Mattingly at 40.7. wRC+ is also park-adjusted, and his 132 mark in that column puts him in territory with Clark (136), McGriff (134), Rod Carew (132), Keith Hernandez (131), and Olerud (130) among first basemen with 8000 or more plate appearances. * as compared to his actual .317/.415/.539 w/367 HRs Full article -- http://www.minorleagueball.com/2013/9/16/4734260/todd-helton-prospect-retrospective-colorado-rockies-career-hall-of-fame