Great question from user splashingpumpkins here. Added pic. -ed.
I don't know if this idea has been tossed around, but I certainly haven't heard it much. However, after ten major-league seasons, Roy Oswalt is starting to build a Hall of Fame case. He's already racked up 44.5 bWAR and 47.6 fWAR:
This is what I find interesting though. Using the BBREF Play Index, I set some admittedly arbitrary guidelines for career numbers. More than 2000 IP. ERA+ greater than or equal to 135. And K/BB greater than or equal to 3.5...
Four pitchers made the cut, one of whom was Oswalt. Now, I doubt he'll still fit these guidelines at the end of his career (just like Halladay, he only slightly meets them), but it's pretty impressive. If he can continue to pitch well, he'll have a good shot at the Hall. Which might be surprising to some. I myself am surprised at the numbers he's accumulated.