In 2013, due to allegations of text messages saying he had admitted to the use of peptides, Curtis Johnson (professional rugby league footballer, born on August 17, 1989 in Darlinghurst, Sydney) 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.
In 2013, Johnston fell in trouble with the ASADA (Australian Sports Anti-Doping Authority) after allegations of text messages saying he had admitted to the use of peptides aired on channel 9. Johnston claimed the messages were a joke between friends and was later cleared to resume playing with North Sydney after 8 weeks of investigation. In 2014, Johnston signed with English club Leigh Centurions but was ineligible to play in England. Johnston scored 4 tries in his return game against the Canterbury-Bankstown Bulldogs. 
