LeftyGrove (1931), Bucky Walters (1939), Hal Newhouser (1945), and Sandy Koufax (1963) each achieved this spectacular accomplishment under the watchful eyes of the B.
You're still left with 298 points--a big drop from 529 but still enough to place Clemens at No. 12 on the all-time list, right behind LeftyGrove and Phil Niekro.