Besides holding a .331 career batting average, Helton has a career average OBP of .430, tenth best in baseball history. Barry Bonds is sixth at .444, and Ted Williams is first at .482. Oh yeah, he also hits for power, too. His .581 career slugging percentage also ranks tenth in baseball history behind three contemporaries: Albert Pujols (4th, .620), Barry Bonds (6th, .607), and Manny Ramirez (8th, .594). Babe Ruth, of course, is first with a .690 career SLG.
Helton's power has gradually waned since 2003, his post-prime years, but he's still been among the most productive hitters in the game. I decided to take a look at how many days of Helton's career, from May 1 onward (to eliminate the wild fluctuations in April that come with having few at-bats) that he spent with a .300 batting average or better, and then I'd compare it with four of the best hitters of the past 15 years: Tony Gwynn, Ichiro Suzuki, Albert Pujols, and Vladimir Guerrero.
Career batting average leaders:
1. Ty Cobb, .366
20. Tony Gwynn, .338
29. Ichiro Suzuki, .332
30. Albert Pujols, .332
31. Todd Helton, .331
45. Vladimir Guerrero, .324
As you can see, Helton has spent 77% of his post-April career above .300, which is incredible, even though it's easily the least among the five hitters shown above. Helton has had four entire seasons in which he never spent a post-April day under .300, Gwynn has had 12, Suzuki two, Pujols four, and Guerrero five.
Helton has played all twelve of his Major League seasons in Colorado, and he does get a noticeable bump from Coors Field. His career AVG/OBP/SLG at home is .367/.465/.663 and on the road it deflates to .294/.394/.499. Partially due to the fact that Coors Field has a spacious outfield, Helton's BABiP is fifty points higher at home than on the road (.362 to .312).
Regardless, Helton has already put up a Hall of Fame-caliber career -- just imagine what it'll look like when he retires some time around 2015.