Mitchell Aubusson is a former Australian professional rugby league footballer who played as a second-row and centre, spending his entire career with the Sydney Roosters in the National Rugby League (NRL). He won three NRL premierships with the Sydney Roosters in 2013, 2018 and 2019. He has also played for NSW Country at representative level. Aubusson is currently the Sydney Roosters record appearance holder with 306 matches played.

The Sydney Roosters are an Australian professional rugby league football club based in the Eastern Suburbs and parts of inner Sydney including the CBD. The club competes in the National Rugby League (NRL) competition. The Roosters have won fifteen New South Wales Rugby League (NSWRL) and National Rugby League titles, and several other competitions. First founded as the Eastern Suburbs District Rugby League Football Club (ESDRLFC), it is the only club to have played in every season at the elite level, and since the 1970s has often been dubbed the glamour club of the league. The Sydney Roosters have won 15 premierships, equal to the record of the St George Dragons. Only the South Sydney Rabbitohs have won more premierships. The club holds the record for having won more matches than any other in the league, the most minor premierships and the most World Club Challenge trophies. The Sydney Roosters are one of only two clubs to finish runners-up in their inaugural season. Currently coached by Trent Robinson and captained by James Tedesco, the Roosters play home games at the Sydney Football Stadium.