Detroit Tigers ... the Reds won 4 games to 3.
The Cincinnati Reds won 5 World Series titles. 1919, 1940, 1975, 1976, and 1990
The Cincinnati Reds won world championships in 1919, 1940, 1975, 1976 and 1990.
Cincinnati Reds won the 1990 world series - their last world series win.
1990
The lats World Series appearance for the Cincinnati Reds was in 1990 when they beat the Oakland Athletics 4 games to none.
Cincinnati Reds swept the Okland Athletics 4-0.
New York Yankees
The Reds have played in the World Series nine times (world championships in bold): 1919, 1939, 1940, 1961, 1970, 1972, 1975, 1976, 1990.
Yes ... the Reds have won 5 World Series (1919, 1940, 1975, 1976, 1990) and won on Opening Day in all 5 of those seasons.
If the Reds beat the SF Giants in this first round of the playoffs, they would then have to beat the winner of the series between Washington and Saint Louis before going on to the World Series.
The Cincinnati Reds have won 5 World Series records.
The Red Sox didn't play in the 1990 World Series. It was the Cincinnati Reds vs Oakland A's.