In 1976, arrest warrants were issued for three Philadelphia Flyers for assault in fights that occurred during an NHL playoff game against Toronto the previous night.
In 1961, the Chicago Blackhawks broke a 23 year drought to win their third Stanley Cup.
In 1940, Cleveland Indians pitcher Bob Feller pitched the only opening day no-hitter.
In 1929, the New York Yankees and Cleveland Indians wore numbers on the back of their uniforms. It was the first time both teams wore numbers on their jerseys in the same game. After this, it became commonplace.
In 1946, MLB commissioner Happy Chandler announced that any player jumping to the newly established Mexican League would be penalized with a five year ban.
In 1999, Wayne Gretzky announced his retirement from the NHL.
In 2000, the New England Patriots selected quarterback Tom Brady from the University of Michigan in the sixth round of the NFL draft.