The Giants score 3 runs in the 17th inning to take a 9 – 6 decision from the Cardinals. Willie McGee gets 4 hits for St. Louis and Mark McGwire hits his 24th homer.

On May 24, 1998 — The Giants score 3 runs in the 17th inning to take a 9 – 6 decision from the Cardinals. Willie McGee gets 4 hits for St. Louis and Mark McGwire hits his 24th homer.

Source:
Baseball Reference May 24