April 9, 1990: Pitcher Tony Fossas threw exactly three pitches and recorded three outs. This was accomplished in the sixth inning.
July 11, 1990: As part of the celebration of Comiskey Park, the Chicago White Sox played a Turn Back the Clock game against the Brewers. The White Sox wore their 1917 home uniforms. This was the first Turn Back the Clock game in the major leagues and started what has become a popular promotion. The club turned off the electronic scoreboards and public address system. They constructed a special manually operated scoreboard in center field for the day and even the grounds-crew wore period costume. General admission tickets were sold for $0.50, popcorn was a nickel, and the stadium organ was shut down for the game.
August 30, 1990: Charlie O'Brien and a player to be named later were traded by the Brewers to the New York Mets for players to be named later. The Mets sent completed the deal by sending Julio Machado and Kevin Brown to the Brewers on September 7. The Brewers completed the deal by sending Kevin Carmody (minors) to the Mets on September 11.