On May 18, 2002 — After sitting through a two-hour rain delay, the Boston Red Sox defeat the Seattle Mariners, 4 – 1, behind the pitching of Pedro Martinez. Martinez strikes out the side in the 1st inning on nine pitches, the 17th time the feat has been performed since 1970. Martinez is now 10-0 with a 0.93 ERA against the Mariners.

Source:
Baseball Reference May 18