Joseph Melton Oliver is an American former professional baseball catcher. During a 19-year professional playing career, Oliver played parts of 13 seasons in MLB for seven different teams during 1989–2001, and was a member of the World Series-winning 1990 Cincinnati Reds. He later managed in Minor League Baseball for the Boston Red Sox organization from 2014 through 2020, and in collegiate summer baseball in 2021 and 2022. As a player, Oliver was listed at 6 feet 3 inches (1.91 m) and 215 pounds (98 kg); he batted and threw right-handed.

The Cincinnati Reds' 1990 season was the Reds' 122nd season in American baseball. Starting with a club best nine straight wins to open the season, as well as holding the top spot in the National League West every game during the season, the Reds went 41–21 after 62 games, splitting the remaining 100 games 50–50 to end up with a 91–71 record. It consisted of the 91–71 Reds winning the National League West by five games over the second-place Dodgers, as well as the NLCS in six games over the Pittsburgh Pirates, and the World Series in a four-game sweep over the overwhelming favorite Oakland Athletics, who had won the World Series the previous year. It was the fifth World Championship for the Reds, and their first since winning two consecutive titles in 1975 and '76.