I haven't read the article but I think Kaat is probably right. After the 75 season, he was 235-187, 3.30 era (113 ERA+), 3,638ip, 64 WAR in his career. After 1976, it was 247-201, 3.31 era (112 ERA+), 3865ip, 67 WAR. If he had retired around then, the 300 winners aren't in yet and he probably gets in.