The heaviest Bundesliga defeat: on 15 May 1971, Köln were hammered 7-0 by Bayern Munich at the Grünwalder Stadion. An own goal by Karl-Heinz Thielen opened the record debacle. The match later came under the microscope in the Bundesliga scandal investigations, though nothing could be proven.
The allegation was that Köln had deliberately lost to help future cup-final opponents Bayern become champions and thereby secure European football for themselves anyway. Bayern still did not win the title. Incidentally, FC also lost 8-0 to Bayern in the DFB Cup in 2003.
