Randy Johnson entered the year with 295 wins but with a 5.71 ERA -- the highest of any pitcher going into his 300th win, beating out Don Sutton (5.56) -- and just three victories through his first eight starts, his approach of the 300-win plateau turned arduous. Still, anyone who cares about round-numbered milestones should take a long look. They won't see anyone else reaching 300 for quite some time.
With the Big Unit's 300th win in the books, we look at the numbers -- was he the last one who will reach that pitching milestone? Baseball Prospectus has the formulas and the final word.