| Roy Keane | IRL | 2007/08 | 0 | 0 | 0 | 0 | 0 | 0 | Sunderland | | |
| Howard Kendall | ING | 1988/89 | 2 | 1 | 0 | 1 | 7 | 4 | Athletic Bilbao | | |
| Jerry Kerr | SCO | 1966/67 | 2 | 1 | 0 | 1 | 3 | 1 | Dundee United | | |
| Géza Kertész | UNG | 1939/40 | 5 | 2 | 1 | 2 | 8 | 10 | Lazio, Roma | | |
| Herbert Kilpin | ING | 1899/00 | 8 | 3 | 2 | 3 | 10 | 8 | Milan | | |
| Jack Kirwan | IRL | 1923/24 | 2 | 0 | 1 | 1 | 3 | 4 | Livorno | | |
| Stanislao Klein | UNG | 1941/42 | 1 | 1 | 0 | 0 | 5 | 0 | Pro Patria | | |
| Nir Klinger | ISR | 2004/05 | 2 | 1 | 1 | 0 | 2 | 1 | Maccabi Tel Aviv | | |
| Jürgen Klopp | GER | 2008/09 | 2 | 2 | 0 | 0 | 5 | 1 | Borussia Dortmund | | |
| Miroslav Klose | GER | 2024/25 | 0 | 0 | 0 | 0 | 0 | 0 | Nürnberg | | |
| Kuno Klötzer | GER | 1974/75 | 2 | 1 | 1 | 0 | 2 | 0 | Hamburger SV | | |
| George Knobel | OLA | 1973/74 | 0 | 0 | 0 | 0 | 0 | 0 | Ajax Amsterdam | | |
| Kjetil Knutsen | NOR | 2025/26 | 1 | 1 | 0 | 0 | 3 | 2 | Bodø/Glimt | | |
| Ronald Koeman | OLA | 2004/05 | 4 | 3 | 0 | 1 | 5 | 2 | Ajax Amsterdam, Benfica Lisbona, Barcelona | | |
| Spitz Kohn | LUS | 1974/75 | 2 | 0 | 0 | 2 | 1 | 4 | Twente | | |
| Bojil Kolev | BUL | 1994/95 | 1 | 1 | 0 | 0 | 3 | 0 | CSKA Sofia | | |
| Antoine Kombouaré | FRA | 2022/23 | 2 | 1 | 1 | 0 | 4 | 1 | Nantes | | |
| Lajos Konrád | UNG | 1936/37 | 3 | 1 | 0 | 2 | 2 | 3 | Triestina | | |
| Attilio Kossovel | ITA | 1956/57 | 1 | 1 | 0 | 0 | 6 | 4 | Palermo | | |
| Gennadi Kostylev | UCR | 1992/93 | 0 | 0 | 0 | 0 | 0 | 0 | CSKA Moscow | | |
| Niko Kovač | CRO | 2018/19 | 1 | 0 | 1 | 0 | 4 | 4 | Bayern München, Borussia Dortmund | | |
| Imre Kovács | UNG | 1960/61 | 4 | 1 | 2 | 1 | 5 | 4 | Újpest FC, Győri ETO, MTK Budapest | | |
| Lajos Kovács | UNG | 1932/33 | 8 | 5 | 1 | 2 | 16 | 8 | Roma, Bologna, Triestina, Alessandria | | |
| Ştefan Kovács | ROM | 1972/73 | 1 | 0 | 0 | 1 | 0 | 1 | Ajax Amsterdam, Romania | | |
| Ján Kozák | SLV | 1996/97 | 0 | 0 | 0 | 0 | 0 | 0 | MFK Košice | | |
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