Köller won the 1986 UEFA European Under-18 Championship with East Germany after defeating Italy 3-1 in the final on 15 October 1986.

[3] 17-year-old Köller then made his first appearance with the first team of BFC Dynamo as substitute for Frank Pastor in the match against FC Carl Zeiss Jena at the Dynamo-Stadion im Sportforum in the eighth matchday of the 1986–87 DDR-Oberliga on 18 October 1986.

[5] He played for BFC Dynamo against Girondins Bordeaux and SV Werder Bremen in the 1987–88 and 1988–89 European Cup.

The match against FC Hansa Rostock in the eighth matchday of the 1989–90 DDR-Oberliga on 21 October 1989 became his last appearance for BFC Dynamo.

[6] This biographical article related to association football in Germany, about a midfielder born in the 1960s, is a stub.