Vin Scully was unable to call Game 2 of the 1989 National League Championship Series (on Wednesday, October 4) because he was suffering from laryngitis. As a result, secondary play-by-play announcer Bob Costas filled in for him. Around the same time, Costas was assigned to call the American League Championship Series between Oakland and Toronto. Game 2 of the NLCS occurred on Thursday, October 5, which was an off day for the ALCS. NBC then decided to fly Costas from Toronto to Chicago to substitute for Scully on Thursday night. Afterwards, Costas flew back to Toronto, where he resumed work on the ALCS the next night.