Was Satchel Paige the greatest pitcher of all time?
I think you can make a good case that he was....he's almost certainly top three. I'd say his competition would be Walter Johnson, Roger Clemens, Lefty Grove, Tom Seaver...
Our only statistical sampling of his talent came when he joined Bill Veeck's Indians at 41* when he pitched with an ERA+** of 164 (actual ERA of 2.38). he pitched an ERA+ average of 124 during the rest of his seven year MLB career (aged 41-48)
Roger Clemens pitched an ERA+ of 146 at 41 with some help from HGH. Walter Johson did not pitch at that age, but he did manage an ERA+ of 149 at age 36, his last really good year. Lefty Grove managed a 185 before falling of a cliff at age 39.
Maybe a deceptive stat; he did not pitch very many innings...you don't hear much about him in the greatest ever conversations though.
*that was his age at least; there is much dispute about his birth certificate. He might have been three years older
**a stat that corrects for deadball/juiceball eras, 1 is average, higher numbers are better