OTOH, he leads MLB in BB's by a greater % then he does in K's. 2nd all time in wild pitches too.
His ERA+ marks (112) are career wise at the level of a #2-3 SP.
His winning % above his teams (a valid way to view a long lived pitcher) is not at all impressive.
The W-L record was always explained away by him being on poor teams, which is a complete myth, in fact his teams as a whole represent a very normal grouping of teams for a guy with his career length.
He's someplace around 23-26th best all time based on longevity, very impressive, but he's closer to Ben Sheets in rWAR then he is to the #3 SP - Clemens. So, it's a myth he's the best of all time, one that seems to be fading these past 10 years or so.
Koufax is the other common wrong answer, but at least Koufax had an amazing peak, something Ryan never had.