This is a sub-list from List of doping cases in sport representing a full list of surnames starting with M.
| 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) | |
| Ariel Machado |
 Brazil
|
Kickboxing | ||
| Krishnan Madasamy |
 India
|
Weightlifting | ||
| 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) | |
| 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 | Methylpredisolone | |
| 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 | ||
| 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 | |
| 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 | |
| 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 |