Also on April 21

  1. 1988MLBGiants6@Reds7Reds walk off in the 12th
  2. 1983MLBRangers2@Orioles3Orioles walk off in the 14th
  3. 1974MLBBrewers5@Tigers6Tigers walk off in the 14th
  4. 1974MLBYankees5@Orioles6Orioles walk off in the 13th
  5. 1960MLBAthletics5@White Sox6White Sox walk off in the 11th
  6. 1957MLBAthletics0@White Sox1White Sox walk off in the 10th
  7. 1957MLBGuardians2@Tigers3Tigers walk off in the 12th
  8. 1956MLBReds2@Cubs3Cubs walk off in the 11th
  9. 1948MLBBraves3@Phillies4Phillies walk off in the 13th
  10. 1946MLBAthletics11@Red Sox12Red Sox walk off in the 10th
  11. 1943MLBCardinals0@Reds1Reds walk off in the 11th

Chosen from the BenchScout archive for what the games meant: the round, a clincher, a walk-off, extra innings, a no-hitter, a one-run finish. Names are the ones on the scoreboard that day.