Baseball Record
Apr 9 1st game at Astrodome, Houston beats Yankees 2-1 in exhibition as Mickey Mantle hits 1st indoor homerun
Mickey Mantle
Golf Major
Apr 11 29th Masters Golf Tournament: Jack Nicklaus wins, shooting a 271
Jack Nicklaus
- Apr 12 1st NL game at Houston's Astrodome (Phillies beat Astros 2-0)
- Apr 15 NFL changes penalty flag from white to bright gold
- Apr 19 69th Boston Marathon won by Morio Shigematsu of Japan in 2:16:33
- Apr 24 NY Met Casey Stengel wins his 3,000 game as manager
- Apr 25 19th NBA Championship: Boston Celtics beat LA Lakers, 4 games to 1