The St. Louis Cardinals’ Paul Dean and the Oakland Athletics’ Vida Blue threw no-hitters on this date.
On Friday, September 21, 1934, during the second game of an Ebbets Field doubleheader against Brooklyn, Dean no-hit the Dodgers for a 3-0 win. The no-no broke the longest no-hitter drought in Major League Baseball history in terms of game days at 535 (more than three years!), a record that stands today.
Older brother Dizzy Dean pitched the opener of that doubleheader, holding the the Dodgers to three hits for a 13-0 complete-game win.
On Monday, September 21, 1970, Blue no-hit the Minnesota Twins at Oakland–Alameda County Coliseum for a 6-0 victory. At 21 years, 1 month and 24 days, Blue set the new modern-era mark for a youngster.