Mirko Cro Cop said that he informed the UFC that he had taken a banned substance and that is why he is now suspended provisionally by USADA.
The MMA legend wrote on his website Thursday that in a "desperate" move to heal a shoulder injury, he injected himself with growth hormone. A few days later, USADA came to test him. Cro Cop wrote that the results of the test are not even back yet, but when he was tested he informed the UFC immediately that he had used the drugs.
"Growth hormones are on the list of banned substances," Cro Cop wrote.