| Kamber, Janick | Lausanne (SUI) / Switzerland U21 |  Switzerland | Midfield |
| Kamber, Robin | Switzerland U17 | Switzerland | Midfield |
| Kamczyk, Ewelina | Poland WU17 |  Poland | Midfield |
| Kameko, Dmytro | Shakhtar (UKR) / Ukraine FUT |  Ukraine | Forward |
| Kameni, Carlos | Málaga (ESP) |  Cameroon | Goalkeeper |
| Kamenyuka, Nikita | Zorya (UKR) | Ukraine | Midfield |
| Kamešs, Vladimirs | Amkar (RUS) / Latvia |  Latvia | Defender |
| Kamghain, Jimmy | Kortrijk (BEL) |  France | |
| Kamil Çörekçi | Kayserispor (TUR) / Turkey U21 |  Turkey | |
| Kaminski, Thomas | Anderlecht (BEL) / Belgium U21 |  Belgium | Goalkeeper |
| Kamiński, Marcin | Lech (POL) / Poland U21 | Poland | Defender |
| Kaminski, Dawid | Wisła (POL) | Poland | Forward |
| Kamiński, Krzysztof | Poland U21 | Poland | Goalkeeper |
| Kamlyuk, Ekaterina | Belarus WU17 |  Belarus | Goalkeeper |
| Kampadais, Leonidas | Panionios (GRE) |  Greece | Forward |
| Kamper, Jonas | Randers (DEN) |  Denmark | Forward |
| Kämper , Meike | Germany WU19 |  Germany | |
| Kampl, Kevin | Salzburg (AUT) / Slovenia U21 / Slovenia |  Slovenia | Midfield |
| Kana-Biyik, Jean-Armel | Rennes (FRA) | France | Defender |
| Kanakoudis, Petros | Platanias (GRE) | Greece | Defender |
| Kandelaki, Ivane | Dila (GEO) / Georgia U21 |  Georgia | Defender |
| Kane, Harry | England U21 |  England | Forward |
| Kane, Marcus | Glentoran (NIR) / Northern Ireland U21 |  Northern Ireland | Midfield |
| Kane, Chris | St Johnstone (SCO) |  Scotland | Forward |
| Kanga, Guelor | Rostov (RUS) |  Gabon | |
| Kaniaka, Nikoletta | Greece WU19 | Greece | Goalkeeper |
| Kanibolotskiy, Anton | Shakhtar Donetsk (UKR) | Ukraine | Goalkeeper |
| Kankaanpää, Katja Annika | Finland WOCO |  Finland | Goalkeeper |
| Kankava, Jaba | Dnipro (UKR) / Georgia | Georgia | Midfield |
| Kantari, Ahmed | Brest (FRA) |  Morocco | Defender |
| Kantárska, Ivana | Slovakia WU19 |  Slovakia | Midfield |
| Kanté, Cédric | Sochaux (FRA) | France | Defender |
| Kantelberg, Leon | Eindhoven (NED) |  Netherlands | Defender |
| Kantoutsis, Tasos | Greece U19 | Greece | Defender |
| Kanu | Terek (RUS) |  Brazil | Forward |
| Kanu | Standard Liège (BEL) | Brazil | Defender |
| Kanunnikov, Maksim | Amkar (RUS) / Russia U21 |  Russia | Forward |
| Kapetanos, Pantelis | CFR Cluj (ROU) | Greece | Forward |
| Kapetanović, Selma | Sarajevo (BIH) |  Bosnia and Herzegovina | Forward |
| Kapino, Stefanos | Panathinaikos (GRE) / Greece U21 | Greece | Goalkeeper |
| Kaplan, Sancak | Kasımpaşa (TUR) | Turkey | Defender |
| Kaplan, Sakir | Liechtenstein U21 |  Liechtenstein | Defender |
| Kaplienko, Olexandr | Ukraine U17 | Ukraine | Defender |
| Kapor, Nebojsa | Leotar (BIH) | Bosnia and Herzegovina | Forward |
| Kappelhof, Johan | Groningen (NED) / Netherlands U21 | Netherlands | Defender |
| Kapteijn, Dennis | Eindhoven (NED) | Netherlands | Goalkeeper |
| Kapukranyan, Grigor | Shahumyan (ARM) / Armenia FUT |  Armenia | Defender |
| Kara, Aytaç | Eskişehirspor (TUR) | Turkey | Midfield |
| Karabelas, Nikos | Levante (ESP) | Greece | Defender |
| Karabelyov, Yanis | Bulgaria U17 |  Bulgaria | Midfield |
