To believe that nobody will ever win 300 games again is to believe not only that the game will be stagnant with no future changes that will effect pitching statistics, but that no pitcher comparable to Rickey Henderson will emerge-a pitcher so unusual that older precedents will no longer apply.  Baseball, however, has always changed and evolved and has always produced sui generis stars with unique skills and abilities.  This latter point should be obvious in any discussion about Randy Johnson.  After all, nobody, as Mel Brooks might have said, anticipates six foot ten inch skinny lefties who are able to pitch into their mid-40s.