For the Haters
1-8 against Dundee: In European competition, a 1-8 thrashing by Scottish side FC Dundee in the very first FC match in the European Cup in 1962/63 remains the most painful memory. A humiliation on the continental stage.
Heaviest Bundesliga defeat: 1. FC Köln were hammered 0-7 at FC Bayern München at the Grünwalder Straße stadium on May 15, 1971 — the worst league defeat in club history.
The most embarrassing turnaround against 1. FC Köln: In the Bundesliga match against SC Freiburg on December 10, 2017, Köln led 2-0 deep into the second half — only to lose 2-3. A collapse that became a symbol for the club's fragility.
The goalless record: Not even the biggest Bundesliga laughing stock Tasmania Berlin managed this. In the 2001/02 season, the Effzeh went 18 consecutive league matches without a win — drawing seven and losing eleven. A negative record even by Köln's standards.
Downfall in the UEFA Cup final: 1. FC Köln reached eight European semi-finals, but only in 1986 did they make it to a final — the UEFA Cup against Real Madrid. After a 2-5 aggregate defeat, the dream of a European title was shattered.
Black smoke for the relegated side: Rarely has a club bid farewell to the Bundesliga as disgracefully as 1. FC Köln on May 16, 1998. After the 0-2 defeat against VfL Bochum, which sealed their first-ever relegation, thousands of fans rioted, hurling flares and smoke bombs onto the pitch.
1-5 against Borussia Mönchengladbach: The worst derby defeat against Gladbach came on November 14, 1984. In a devastating night, the arch-rivals dismantled Köln in their own backyard.
Bundesliga record against Mönchengladbach: Losing derbies is never good. Consistently losing derbies against the "arch enemy" is worse. Köln's overall Bundesliga record against Gladbach leans uncomfortably in the neighbours' favour.
The most delightful season from a Geissbock-hater's perspective came in 2017/18. From the Europa League straight to relegation — the carnival club managed to crash from European competition to the 2. Bundesliga in a single, catastrophic season.