# List of doping cases in sport (K)

This is a sub-list from List of doping cases in sport representing a full list of surnames starting with K.
* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
| Name | Country | Event | Banned substance(s) | Reference(s) |
| Alina Kabaeva | Russia | Rhythmic gymnastics | Furosemide | |
| Alimuddin Kakar | Pakistan | Weightlifting | | |
| Georgios Kalogeropoulos | Greece | Swimming | Cannabis | |
| Mohamed Kallon | Sierra Leone | Football (soccer) | Nandrolone | |
| Kaspars Kambala | Latvia | Basketball | Cocaine metabolite | |
| Ruslan Kapaev | Kyrgyzstan | Weightlifting | | |
| Tovmasjan Karen | Netherlands | Weightlifting | Metandienone | |
| Rogerio Karfunkelstein | Brazil | Swimming | Stanozolol | |
| Faisal Karim | Pakistan | Boxing | Cannabis | |
| Nauman Karim | Pakistan | Boxing | | |
| Mario Kasun | Croatia | Basketball | Cathine | |
| Kevin Kasuza | Zimbabwe | Cricket | Recreational drugs | |
| Sesil Karatantcheva | Bulgaria | Tennis | Nandrolone | |
| Svend Karlsen | Norway | Strongmen | | |
| Mohd Karmand | Afghanistan | Weightlifting | Methandienone | |
| Samko Karol | Slovakia | Weightlifting | Drostanolone | |
| Fetie Kasaj | Albania | Weightlifting | | (in Norwegian) |
| Vasiliki Kasapi | Greece | Weightlifting | Methyltrienolone, Buprenorphine | |
| Andrey Kashechkin | Kazakhstan | Cycling | Blood doping | |
| Asmaa Kataria | Egypt | Swimming | Ephedrine | |
| Mohamed Katir | Spain | Athletics | 3 whereabouts failures in a 12-month period and tampering with an anti-doping investigation | |
| Gursharanpreet Kaur | India | Wrestling | Methylhexaneamine | |
| Valeriya Kaverina | Russia | Weightlifting | Metandienone | |
| Devi Kavita | India | Weightlifting | Metandienone | |
| Valery Kaykov | Russia | Cycling | GW501516 | |
| Kboi | Vietnam | Weightlifting | Testosterone, Epitestosterone | |
| Zoltan Kecskes | Hungary | Weightlifting | | |
| Lachlan Keeffe | Australia | Australian rules football | Clenbuterol | |
| Ronwin Kelly | South Africa | Rugby union (former bodybuilder) | Nandrolone | |
| Robert Kendrick | United States | Tennis | Methylhexaneamine | |
| Daniel Kenedy | Portugal | Football (soccer) | Furosemide | |
| Martin Kennedy | Australia | Rugby League | SARMS, growth hormone, chorionic gonadotrophin, insulin | |
| Paddy Kenny | Ireland | Football (soccer) | ephedrine | |
| David Kerkhoffs | Belgium | Swimming | Cannabinoids | |
| Jason Kerr | Canada | Bobsleigh | Boldenone, nandrolone, testosterone, trenbolone | |
| Paul-Alain Kersale | France | Swimming | Cannabinoids | |
| Matthias Kessler | Germany | Cycling | Testosterone | |
| El Maoui Khalil | Tunisia | Weightlifting | Methylhexaneamine | |
| Naglaa Hamed Khallaf | Egypt | Weightlifting | Stanozolol | |
| Vitaliy Khan | Kazakhstan | Swimming | Cannabis | |
| Masuam Khatri | India | Wrestling | Methylhexaneamine | |
| Praeonapa Khenjantuek | Thailand | Weightlifting | Metandienone | |
| Nan Aye Khine | Myanmar | Weightlifting | Steroids | |
| Natalia Khlestkina | Romania | Weightlifting | Metenolone | |
| Bahodur Kholov | Tajikistan | Weightlifting | Nandrolone | |
| Yaroslav Khoma | Ukraine | Football (soccer) | | |
| Albina Khomich | Russia | Weightlifting | Anabolic steroids | |
| Yekaterina Khoroshikh | Russia | Hammer throwing | | |
| Natalya Khudyakova | Ukraine | Swimming | Stanozolol | |
| Oksana Khvostenko | Ukraine | Biathlon | | |
| Zbyszko Kienast | United Kingdom | Weightlifting | Testosterone | |
| Rotson Kilambe | Zambia | Football (soccer) | Cannabis | |
| Kazbek Kilou | Belarus | Wrestling | Metenolone | |
| Igor Kim | Kazakhstan | Weightlifting | Furosemide, T/E 21.4 | |
| Kim Jong Su | North Korea | Shooting | Propanolol | |
| Hyang Kim | North Korea | Weightlifting | Methyltestosterone, Methandriol | |
| Gerard Kinsella | England | Football (soccer) | Nandrolone | |
| Gergana Kirilova | Bulgaria | Weightlifting | Steroids | |
| Harri Kirvesniemi | Finland | Cross-country skiing | HES | |
| Karolin Kittel | Germany | Swimming | Refusal to submit to doping test | |
| Steffen Kjærgaard | Norway | Cycling | | |
| Boonnatee Klakasikit | Thailand | Weightlifting | Methandienone | |
| Sarah Klein | Australia | Athletics | Failure to provide testing sample | |
| Rory Kleinveldt | South Africa | Cricket | Marijuana | |
| Ivan Klim | Belarus | Weightlifting | Stanozolol | |
| Vitali Klitschko | Ukraine | Boxing | Anabolic steroids (self-admitted) | |
| Kasem Knakri | Syria | Weightlifting | | |
| Tonya Knight | United States | Bodybuilding | Using a stand-in when chosen for a random drug test | |
| Bernhard Kohl | Austria | Cycling | CERA | |
| Francis Kombe | Zambia | Football (soccer) | Cannabis | |
| Anton Komlev | Russia | Swimming | | |
| Izabela Kondraszuk | Poland | Gymnastics | Dimethylpentylamine | |
| Yoann Kongolo | Switzerland | Kickboxing | Methandrostenolone and stanozolol | |
| Steven Koops | Australia | Australian rules football | Pethidine | |
| Mouhanad Korabi | Syria | Weightlifting | Stanozolol, Metenolone, Methyltestosterone | |
| Olha Korbka | Ukraine | Weightlifting | Methandienone | |
| Petr Korda | Czech Republic | Tennis | Nandrolone | |
| Juha Korhonen | Finland | Swimming | Cannabis | |
| Andrey Korneyev | Russia | Swimming | Bromantan | |
| Chris Korol | Canada | Bobsleigh | | |
| Ekaterina Koroleva | Russia | Cycling | | |
| Anzhelika Kotyuga | Belarus | Speed skating | Anabolic steroids | |
| Eleni Kourtelidou | Greece | Weightlifting | Methyltrienolone, Buprenorphine | |
| Nikos Kourtidis | Greece | Weightlifting | | |
| Zoltán Kovács | Hungary | Weightlifting | Refusal to provide test | |
| Justyna Kowalczyk | Poland | Cross-country skiing | Dexamethason | |
| Kateryna Kozlova | Ukraine | Tennis | 1,3-Dimethylbutylamine | |
| Nina Kraft | Germany | Triathlon | Erythropoietin (EPO) | |
| Natascha Kraus | Germany | Swimming | Reproterol | |
| Daniel Kreutzer | Germany | Ice hockey | Missed test | |
| Tobias Kreuzmann | Germany | Swimming | Finasteride | |
| Lennie Kristensen | Denmark | Cycling | | |
| Ante Krizan | Croatia | Swimming | Methylhexaneamine | |
| Lubos Krizko | Slovakia | Swimming | Tamoxifen | |
| Karen Kronemeyer | Netherlands | Squash | Benzylpiperazine | |
| Stein Olav Krosby | Norway | Speed skating, long track | Testosterone | |
| Roman Kryklia | Ukraine | Kickboxing | Meldonium, clenbuterol | |
| Andrey Krylov | Russia | Gymnastics | THC | |
| Herkie Kruger | South Africa | Rugby union | Nandrolone | |
| Vasyl Kruk | Ukraine | Weightlifting | Stanozolol, testosterone | |
| Ondrej Kruzel | Slovakia | Weightlifting | Drostanolone | |
| Virpi Kuitunen | Finland | Cross-Country skiing | | |
| Galina Kulakova | Russia | Cross-Country skiing | Ephedrine | |
| Pavel Kulizhnikov | Russia | Speed skating | Methylhexanamine, Meldonium | |
| Sumit Kumar | India | Wrestling | Methylhexanamine | |
| Saliya Kumara | Sri Lanka | Rugby union | Methylhexanamine | |
| Pratima Kumari | India | Weightlifting | | |
| Ouyang Kunpeng | China | Swimming | Clenbuterol | |
| Dimitar Kutrovsky | Bulgaria | Tennis | | |
| Alexi Kutsenko | Russia | Swimming | Testosterone | |
| Ruza Kuzieva | Uzbekistan | Powerlifting | Methandienone | |
| Albert Kuzilov | Georgia | Weightlifting | Metandienone | |
| Zhassulan Kydyrbayev | Kazakhstan | Weightlifting | Stanozolol | |
| Artur Kyshenko | Ukraine | Kickboxing | | |