Greek Olympian high jumper Dimitris Chondrokoukis, 24, is leading the list of recent Olympians who have been thrown out of the London games for using illicit substances, commonly known as "doping."

Though the International Association of Athletics Federations, or IAAF, has a list a mile long of substances that Olympic contenders are not allowed to take for fear that they'll get an edge over their opponents, Chondrokoukis was allegedly taking the most infamous of them all — stanozolol, an anabolic steroid that led to the notorious downfall of Canadian sprinter Ben Johnson in the 1988 Seoul Games.

Chondrokoukis withdrew from the games on Thursday after the drug was found in a urine test that was sprung on him, reports the UK's Guardian. The news came just one day after Greek triple jumper Voula Papachristou was kicked out of the games for tweeting a racist comment.

And that isn't all that demonstrates how seriously the IAAF is cracking down on doping in the Olympics this year. Hungarian discus thrower Zoltan Kovago, 33, refused to take a drug test and has therefore been banned from competing in his sport for two years.

Two weeks ago U.S. relay swimmer Debbie Dunn was disqualified for testing positive for illicit substances, as was Moroccan Mariem Alaoui Selsouli, reports LA Late.

Also on Wednesday, the IAAF suspended nine track athletes — eight women and one man — for doping, reports Zee News: Ukrainians Nataliya Tobias and Antonina Yefremova, Bulgarian Inna Eftimova, Moroccan Abderrahim Goumri, Greek Irini Kokkinariou, Turkish Meryem Erdogan and Russians Svetlana Klyuka, Nailiya Yulamanova and Yevgenina Zinurova.

For his part, Chondrokoukis is planning on asking for a re-test.

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