Before interleague play, the chances of seeing both reigning Cy Young winners face off against each other in a regular-season game was rare. The only chance was in the World Series when the American League and National League finally played each other. In a 1989 game between the New York Mets and Los Angeles Dodgers, history was made.
August 28, 1989, was the day when the Mets sent Frank Viola to the mound against Orel Hershiser. Viola, who won the 1988 Cy Young as a member of the Minnesota Twins, joined the Mets in mid-1989 via trade.