One of the highlights of Fletcher's Sydney Roosters career was his appearance at second-row forward in the 2000 NRL Grand Final, their first in 20 years. He also helped Australia inflict a humiliating defeat on the New Zealand national team 52–0 as well as a 3–0 whitewash of Queensland in the State of Origin series. Fletcher is perhaps best known in Origin circles for his hand grenade try celebration which he performed in 2000 series where NSW thumped QLD 56-16. It is believed that the try celebration forced Queensland to change their whole strategy towards Origin and it created a pathway for Queensland to win eleven of fourteen series since 2006 (and a record eight straight between 2006 and 2013). Former Queensland player Wendell Sailor said “As a Queenslander, you never forget that". Queensland Origin great Gorden Tallis had previously spoken about how that try celebration eventually led to a shift in the State of Origin balance of power which saw Queensland win back the Shield in 2001. Former player Matthew Johns claims that the try celebration started a Queensland dynasty. Former Queensland coach Chris Close spoke about Fletcher's try celebration in 2016 "I thought it was disgraceful act and a disgraceful show of disrespect, You would certainly never, ever see that from any Queensland team, It still burns. F---ing oath it does".