In 2013, due to allegations of text messages saying he had admitted to the use of peptides, Curtis Johnson was investigated by ASADA but was cleared after claiming it was a joke between friends and resumed playing afterwards where he scored 4 tries in his return game against the Leigh Centurions.
Curtis Johnson may refer to: Curt Johnson (soccer) (born 1968), soccer manager Curtis Johnson (cornerback) (born 1948), former cornerback Curtis Johnson (linebacker) (born 1985), American football player Curtis Johnson (politician) (born 1952), American politician Curtis Johnson (American football coach) (born 1961), football coach Curtis Johnson (athlete) (born 1973), American athlete S. Curtis Johnson, business magnate Dan Curtis Johnson, programmer and comic book writer 2013  February - Australian Crime Commission released report titled Organised Crime And Drugs In Sport. The investigation identified widespread use of prohibited substances including peptides, hormones and illicit drugs in professional sport that was facilitated by sports scientists, high-performance coaches and sports staff. Essendon Football Club from the Australian Football League and six National Rugby League Canberra Raiders, Cronulla Sutherland Sharks, Newcastle Knights, Manly-Warringah Sea Eagles, North Queensland Cowboys, Penrith Panthers teams were implicated after of the report. 
