# List of doping cases in sport (M)

This is a sub-list from List of doping cases in sport representing a full list of surnames starting with M.
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| Name | Country | Event | Banned substance(s) | Reference(s) |
| Ma Wenhua | China | Weightlifting | | |
| Mbulelo Mabizela | South Africa | Football (soccer) | Cannabis | |
| Enzo Maccarinelli | United Kingdom | Boxing | Methylhexaneamine (MHA) | |
| Adam MacDougall | Australia | Rugby league | Ephedrine, Amfepramone | |
| Ariel Machado | Brazil | Kickboxing | | |
| Krishnan Madasamy | India | Weightlifting | | |
| Wesley Madhevere | Zimbabwe | Cricket | Recreational drugs | |
| Gustavo Madureira | Portugal | Swimming | Terbutaline | |
| Gouda Maged | Egypt | Weightlifting | Stanozolol, Hydroxystanozolol | |
| Brian Magee | United Kingdom | Boxing | Oxilofrine | |
| Maurren Maggi | Brazil | Athletics | Clostebol | (in Portuguese) |
| Emmanuel Magnien | France | Cycling | Corticoids | |
| Salma Hassan Mahmoud | Egypt | Volleyball | Steroids | |
| Sean Mahoney | United States | Swimming | Methylhexaneamine | |
| Bill Mahood | Canada | Mixed martial arts | Drostanolone | |
| Roman Maikin | Russia | Cycling | | |
| Reni Maitua | Australia | Rugby (NRL) | Clenbuterol | |
| Igor Majcen | Slovenia | Swimming | | |
| Aleksandra Majda | Poland | Swimming | Ephedrine | |
| Aleksej Makarov | Croatia | Volleyball | Methylhexaneamine | |
| Joel Makencie | Cuba | Weightlifting | Metandienone | |
| Adam Maklari | Hungary | Water polo | Methandienone | |
| Nikita Maksimov | Russia | Swimming | Oral-Turinabol | |
| Jehad Malalla | Brunei | Weightlifting | Methylhexanamine | |
| Xavier Malisse | Belgium | Tennis | Missed test | |
| Daniel Maloney | United Kingdom | Weightlifting | Anabolic steroids | |
| Daniel Malvino | Brazil | Wrestling | Anabolic steroids | |
| Mitchil Mann | Australia | Weightlifting | Clenbuterol | |
| Milka Maneva | Bulgaria | Weightlifting | Steroids | |
| Andrea Mangiante | Italy | Swimming | Testosterone | |
| Daniele Mannini | Italy | Football (soccer) | Missed test | |
| Ahmed Mansour | Egypt | Wrestling | Methylhexaneamine | |
| Eero Mäntyranta | Finland | Cross-country skiing | Amphetamine | |
| Ilya Manukhov | Canada | Wrestling | Letrozole | |
| Jesús Manzano | Spain | Cycling | EPO, Cortisone, testosterone, human growth hormone, nandrolone, oxyglobin | |
| Diego Maradona | Argentina | Football (soccer) | Cocaine (1991), Ephedrine (1994), Cocaine metabolites (1997) | |
| Lisa Marangon | Australia | Triathlon | Ostarine | |
| Kornelia Marek | Poland | Cross-Country Skiing | Erythropoietin (EPO) | |
| Ohman Maria | India | Weightlifting | Metandienone | |
| Peter Markoch | Croatia | Swimming | Cannabis | |
| Georgi Markov | Bulgaria | Weightlifting | Steroids, tampering with test | |
| Ivan Markov | Bulgaria | Weightlifting | Steroids | |
| Nate Marquardt | United States | mixed martial arts | Nandrolone | |
| Mariana Marques | Portugal | Swimming | Methylprednisolone | |
| Nidia Rosa Pardo Marrugo | Colombia | Weightlifting | | |
| Cory Marsh | Canada | Gymnastics | Methylhexaneamine | |
| Mark Marshall | Jamaica | Football (soccer) | methylhexaneamine | |
| Starling Marte | Dominican Republic | Baseball | Nandrolone | |
| Benjamin Martel | Canada | Cycling | Testosterone | |
| Matsa Martha | Greece | Swimming | Stanozolol | |
| Carlos Martinez | Canada | Canadian football | Methylhexaneamine | |
| Maria Martinez | Argentina | Weightlifting | Boldenone | |
| Marvin Martinez | El Salvador | Weightlifting | | |
| Paolo Martini | Italy | Water polo | Cannabis | |
| Claudia Martino | Italy | Water polo | Pseudoephedrine | |
| Paloma Garcia Martorell | Brazil | Water polo | Methylhexaneamine | |
| Landon Marzullo | United States | Swimming | Cannabis | |
| Saeed Abdul Hameed Marwan | Yemen | Weightlifting | | |
| Amina Maskhadova | Russia | Weightlifting | | |
| Mohamed Masoud | Egypt | Weightlifting | Methylhexanamine | |
| Rodolfo Massi | Italy | Cycling | Cortisone | |
| Petar Majstorović | Switzerland | Kickboxing | | |
| Kaloyan Zdravkov Matliev | Bulgaria | Swimming | Methylhexaneamine | |
| Martha Matsa | Greece | Swimming | Stanozolol | |
| Maxim Matveyev | Russia | Weightlifting | | |
| Tomas Matykiewicz | Czech Republic | Weightlifting | | |
| Brandon Mavuta | Zimbabwe | Cricket | Recreational drugs | |
| Jeremy Mayfield | United States | Auto racing | Amphetamine | |
| O. J. Mayo | United States | Basketball | Dehydroepiandrosterone | |
| Filip Mazanik | Czech Republic | Water polo | Cannabis | |
| Iain McCorkindale | England | Ten-pin bowling | Benzoylecgonine | |
| Sean McCully | United States | Mixed martial arts | Nandrolone | |
| Kevin McDine | England | Darts | Cocaine | |
| Mark McGwire | United States | Baseball | Steroids (self-admitted after retirement; Major League Baseball did not test for steroids during his career) | |
| Duncan McLean | Canada | Canadian football | | |
| Brigitte McMahon | Switzerland | Triathlon | Erythropoietin | |
| Tim McNeill | United States | Gymnastics | Triamcinolone acetonide | |
| David Meca | Spain | Swimming | Nandrolone | |
| Ericka Medrano | El Salvador | Weightlifting | | |
| Nishant Mehra | India | Football (soccer) | THC | |
| Roland Meier | Switzerland | Cycling | Erythropoietin (EPO) | |
| Birgit Meineke | East Germany | Swimming | Turinabol (self-admitted) | |
| Filip Meirhaeghe | Belgium | Cycling | Erythropoietin (EPO) | |
| Jenrry Mejía | Dominican Republic | Baseball | Stanozolol, Boldenone | |
| Oussama Mellouli | Tunisia | Swimming | Amphetamine | (in Dutch) |
| Marcelo Melo | Brazil | Tennis | Isometheptene | |
| Sergio Mendoza | Honduras | Football (soccer) | Steroid | |
| Joey Meneses | Mexico | Baseball | Stanozolol | |
| Simon Mensing | England | Football (soccer) | Methylhexaneamine | |
| Eddy Merckx | Belgium | Cycling | Reactivan, lodinated glycerol, Pemoline | |
| Jordan Meredith | Canada | Canadian football | | |
| Shawne Merriman | United States | American football | Steroid | |
| Fadi Merza | Austria | Kickboxing | | |
| Kevin Mestdagh | Belgium | Water polo | Cocaine | |
| Nazih Samer Mezayek | Jordan | Swimming | Nandrolone | |
| Ammar Mezghiche | Algeria | Weightlifting | Norandrosterone | |
| Piotr Michalski | Poland | Water polo | Cannabis | |
| Jeff Michels | United States | Weightlifting | Testosterone | |
| Luca Michieletto | Italy | Water polo | Cannabis | |
| Ninel Miculsecu | Romania | Weightlifting | T/E 19 | |
| Mark Middleton | United Kingdom | Weightlifting | Methyltestosterone, testosterone | |
| Mike Mihelic | Canada | Canadian football | | |
| Mikayel Mikayelyan | Armenia | Weightlifting | Stanozolol | |
| Andrei Mikhalyov | Belarus | Ice hockey | Methylhexaneamine | |
| Youri Mikulchin | Russia | Water polo | Carphedon | |
| Toni Milanović | Croatia | Muay Thai | Boldenone, salbutamol and methylhexanamine | |
| Harry Milanzi | Zambia | Football (soccer) | Cannabis | |
| David Millar | United Kingdom | Cycling | Erythropoietin (EPO) | |
| Jarrell Miller | United States | Boxing | GW501516, EPO, growth hormone | |
| Sevdalin Minchev | Bulgaria | Weightlifting | Furosemide | |
| Donka Mincheva | Bulgaria | Weightlifting | Steroids | |
| Richa Mishra | India | Swimming | Methylhexaneamine | |
| Victor Mitrov | Greece | Weightlifting | Methyltrienolone, Buprenorphine | |
| Artak Mkrtchyan | Armenia | Weightlifting | Metandienone | |
| Mostafa Mohamed | Egypt | Wrestling | Methylhexaneamine | |
| Saufik Mohd | Malaysia | Weightlifting | Metandienone | |
| Denis Moiseev | Russia | Rowing | | |
| Fabiola Molina | Brazil | Swimming | Methylhexaneamine | |
| Bjarne Møller | Denmark | Triathlon | Erythropoietin (EPO) (self-admitted) | (in Danish) |
| Claus Michael Møller | Denmark | Cycling | | |
| Miskander Momynbekov | Kyrgyzstan | Weightlifting | Stanozolol | |
| Salvatore Monaco | Italy | Football (soccer) | Nandrolone | |
| Shane Monahan | United States | Baseball | Deca-Durabolin, Winstrol & amphetamines Self-admitted in 2007, last played in minors 2003. | |
| Marisol Monasteriodos | Spain | Weightlifting | Heptaminol | |
| Gianpaolo Mondini | Italy | Cycling | Erythropoietin (EPO) | |
| Scott Moninger | United States | Cycling | 19-norandrosterone | |
| Zachary Monsees | United States | Swimming | Cannabis | |
| Franck Montagny | France | Auto Racing | Cocaine | |
| Agustin Montero | Dominican Republic | Baseball | | |
| Erik Morales | Mexico | Boxing | Clenbuterol | |
| Jarosław Morawiecki | Poland | Ice hockey | Testosterone | |
| Josh Moreau | United States | Weightlifting | Cannabinoids | |
| Christophe Moreau | France | Cycling | Erythropoietin (EPO) (self admitted) | |
| Rui Moreira | Portugal | Swimming | Cannabis | |
| Cristian Moreni | Italy | Cycling | Testosterone | |
| María Isabel Moreno | Spain | Cycling | Erythropoietin (EPO) | |
| Alexander Morgunov | Russia | Swimming | Norandrosterone, Noretiocholanolone | |
| Franck Morland | France | Water polo | Cocaine | |
| Niccolò Mornati | Italy | Rowing | Anastrozole | |
| Luca Moro | Italy | Auto racing | Benzoylecgonine | |
| Daniel Moro Fernandez | Spain | Water polo | Cannabis | |
| Ivan Moro Fernandez | Spain | Water polo | Cannabis | |
| John Moroney | Ireland | Rugby | Cannabis | |
| Johnnie Morton | United States | Mixed martial arts | anabolic steroids | |
| Mike Morse | United States | Baseball | Steroids | |
| Ksenia Moskvina | Russia | Swimming | | |
| Shane Mosley | United States | Boxing | Tetrahydrogestrinone (THG, also known as "the clear"), Erythropoietin (EPO), and The cream | |
| Ezequiel Mosquera | Spain | Cycling | Hydroxyethyl starch | |
| Guillermo Mota | Dominican Republic | Baseball | | |
| Said Moulla | Morocco | Wrestling | Stanozolol, Boldenone | |
| Bradley Mousley | Australia | Tennis | Ecstasy | |
| Mykhailo Mudryk | Ukraine | Football (soccer) | Meldonium | |
| Johann Mühlegg | Spain | Cross-country skiing | Darbepoetin | |
| Jarrod Mullen | Australia | Rugby league | Drostanolone | |
| David Munyasia | Kenya | Boxing | Stimulant | |
| Giuseppe Muraglia | Italy | Cycling | hCG (Human chorionic gonadotropin) | |
| Amar Muralidharan | India | Swimming | Methylhexaneamine | |
| Sam Murray | Australia | Australian rules football | Cocaine | |
| Thomas Murre | France | Beach volleyball | Cannabinoids | |
| Johan Museeuw | Belgium | Cycling | Aranesp-darbepoetin alfa | (self-admitted) |
| Anatoliy Mushyk | Israel | Weightlifting | T/E 9.8 | |
| Murtazali Muslimov | Azerbaijan | Wrestling | Arostanolone metabolite and oxandrolone metabolites | |
| Halil Mutlu | Turkey | Weightlifting | Anabolic steroids | |
| Adrian Mutu | Romania | Football (soccer) | Cocaine | |
| Jenna Myers | Australia | Weightlifting | | |
| Mika Myllylä | Finland | Cross-country skiing | HES | |