Sean Patrick McMahon

  • 26Caps
  • 886Wallaby Number
  • 27Age
PositionNo. 8/ Flanker
Date Of Birth17 June 1994
Place Of BirthBrisbane
SchoolSt. Joseph's Nudgee College
Debut ClubGPS (Brisbane)
Other ClubsEndeavour Hills (Melbourne), Suntory Sungoliath (JAP)
ProvinceMelbourne Rebels
Debut Test Match2014 Wallabies v Wales, Cardiff
Final Test Match2017 Wallabies v Scotland, Edinburgh


A graduate of Brisbane’s famous Nudgee College Sean McMahon was almost lost to rugby. Of the view that “nothing was really working for me footy-wise, no-one was interested”, McMahon had already filled out all the forms to enter basic training with the Australian Army.

His path was all but set until he was convinced to join a cobbled together squad, the “Newstar” team, for the 2011 Noosa Sevens tournament. Despite having never played 7s McMahon, fellow future Wallaby Samu Kerevi and the rest of the Newstars enjoyed a Hollywood-esque fairytale run to the final where, with a try on the siren, they defeated the senior Australian Men’s team 25-24. Two weeks later national 7s coach Michael O’Connor chose McMahon in the Australian side for the World Sevens series tournament on the Gold Coast. He was, at that time, our youngest ever representative and remained in the program through 2014 - the same year he won his first Test cap against Wales in Cardiff.

In 2017 his performances, particularly the final two Tests against New Zealand, highlighted how much he will missed in 2018 after he signed a two-year contract to play in Japan.



Represented Australian Schools against England and New Zealand.


Selected in the Australian U20s squad for the fifth-annual IRB Junior World Championship tournament in South Africa.


Selected in the Australian U20s squad for the sixth-annual IRB Junior World Championship tournament in France.


McMahon captained the Australian U20s squad to the seventh-annual IRB Junior World Championship tournament in New Zealand. He won Australia’s U20 Player of the Year award and a bronze, medal with the Australian Men’s Sevens team at the Commonwealth Games in Glasgow. Selected on the Spring Tour, McMahon won his first Test cap at blindside flanker in the starting XV for the international against Wales in Cardiff.


McMahon picked up a further three caps however his season was interrupted by injury. He missed the opening six rounds of Super Rugby after he underwent ankle surgery during the off-season to repair an injury sustained on the 2014 Spring Tour only to then suffer a knee injury during his rehabilitation. On his return to Super Rugby, McMahon then suffered a painful hip injury when he went down late in the first half against the Chiefs. He was selected for the Wallabies Rugby World Cup squad and subsequently won the man-of-the-match against the United States in Chicago. Despite that, McMahon only won two caps during the tournament, against Uruguay and Wales, the later coming after Michael Hooper was suspended.


He won nine caps however just four came in the run-on side as he battled David Pocock, Michael Hooper and Scott Fardy for a place in the back-row.


A dislocated wrist for the Melbourne Rebels against the Crusaders delayed McMahon’s international season however he recovered to collect 11 Test caps.

Sean Patrick McMahon