Graham was part of the silver medal-winning Jamaican 4 × 400 m team at the 1988 Summer Olympics, running in the first round and semi-final, though not the final.

[4] Graham first played a critical whistleblower role in the BALCO scandal (Bay Area Laboratory Co-operative) of June 2003, anonymously sending a syringe containing the designer steroid tetrahydrogestrinone to the United States Anti-Doping Agency.

[9] In July 2006, Angel Guillermo Heredia testified before a US Federal Grand Jury that he had worked for Graham from 1996 to 2000, providing illegal performance-enhancing drugs.

[11] An unsent letter written by BALCO's Victor Conte to the U.S. Anti-Doping Agency described the use of an oral testosterone by Graham that "will clear the body and be undetectable in urine in less than a week after discontinuing use."

[13] The International Association of Athletics Federations (IAAF) said on 31 July 2006 that Graham could face a two-year ban if evidence links him to any doping violations and the United States Anti-Doping Agency decides not to take action.

[15] This was the first time a coach has received such a ban based on the excessive number of athletes in their charge who have tested positive.