In Houston, Reds pitcher Jim McGlothlin fires a two-hitter as Cincy wins, 3 – 0. Joe Morgan and Jesus Alou have the only hits for the Astros.

On May 21, 1970 — In Houston, Reds pitcher Jim McGlothlin fires a two-hitter as Cincy wins, 3 – 0. Joe Morgan and Jesus Alou have the only hits for the Astros.

Source:
Baseball Reference May 21