i don't know how you can't make a determination right now as to whether Pujols is better than Gehrig, or where A-Rod stands amongst the all-time greats. we're pretty well-aware already of what each player's true talent level is and can easily compare to other great's peaks also. the only thing yet to be determined is how long they'll sustain high levels of play, and that is more of an issue of counting stats, where there is more noise than is worth sifting through for these comparisons. that would be simply a discussion of milestones; but i don't really think any more of Biggio's career since he floundered around that extra season to reach 3,000 hits.