7th Reds OF Bobby Tolan suffers a ruptured Achilles tendon while playing basketball on the Reds off-season team and undergoes surgery. He’ll return to action but reinjure the heel on May 7 and miss the entire 1971 season. The front office disbands the basketball team.
11th Tigers P John Hiller, age 27, suffers a heart attack and will miss the 1971 season. Hiller will have seven feet of intestine removed to relieve a cholesterol problem before making a remarkable comeback.
21st The BBWAA fails to elect anyone in the annual Hall of Fame election. With 270 votes required, the nearest finishers are Yogi Berra (242) and Early Wynn (240).
23rd Brewers owner Bud Selig hires Frank Lane to be GM, the fifth club that Lane has worked for in this capacity.
29th The Pirates trade OF Matty Alou and P George Brunet to the Cardinals for OF Vic Davalillo and P Nelson Briles.
31st The Hall of Fame Special Veterans Committee selects 7 men for enshrinement: former players Jake Beckley, Joe Kelley, Harry Hooper, Rube Marquard, Chick Hafey, Dave Bancroft, and executive George Weiss.