What disturbs Jose Canseco to join the team “Tigres de Quintana”?

Jose Canseco rejected to submit to a urine analysis for steroids, when he tried to come back to the Mexican Baseball League. It was earlier claimed that the “Tigres de Quintana” of Cancun agreed to give him the 2nd  chance and invited him to play.
Jose Canseco refused to submit to testing for steroids that had to be performed by officers of the Mexico’s National Commission for Physical Culture and Sport (CONADE). CONADE represents government agency that manages Olympic sports in Mexico.
Cuauhtemoc Rodriguez Meza, the chief executive officer of this baseball team, stated that Jose Canseco would not be permitted to play for the team because he had acknowledged that he applied forbidden medicines.
Jose Canseco acknowledged that he was on testosterone replacement therapy under supervision of a physician in the US. He noted that he was on TRT since 2008. Jose Canseco was not surprised by the requirement to submit to urine analysis for steroids. He wrote on his Twitter account last month that the Minor League Baseball would conduct testing for banned drugs.
It is known that  a sportsperson can utilize steroids for TRT and take part in competitions, if he/she has acquired a therapeutic use exemption (TUE). A TUE allows intake of prohibited preparations, if it is supported by medical needs.
It is obvious that Jose Canseco has prescription from his physician that confirms his condition which requires being TRT. But Jose Canseco hasn’t acquired a TUE for administration of testosterone.
Jose Canseco has openly admitted that he had a prescription from his health care provider to administer testosterone as a part of testosterone replacement therapy. He described about  this condition in a documentary in 2008. Jose Canseco noted that he discontinued utilizing illegal steroids and had low testosterone production which was provoked by steroids. Then his physician prescribed him administering a testosterone gel to escape from unwanted reactions of steroids.
You observe that Jose Canseco’s intake of steroids is justified because he has medical need for administration. But since he doesn’t have any TUE, it is unclear whether he would play in the team that has testing for steroids.
The CEO of “Tigres de Quintana” admitted that he had known that Jose Canseco was receieving TRT but he invited him to play, just obtaining a TUE.