Brownlee also finished the 2021 Super League Triathlon Championship Series in 3rd place, behind fellow Team Relay member Alex Yee and Olympic bronze medallist, Hayden Wilde of New Zealand.

Between them, the Brownlee brothers, along with Spanish pair Mario Mola and Javier Gomez, and latterly Frenchman Vincent Luis, were the dominant male 'Olympic' distance triathletes for most of the 2010's.

[16][17] During the 2009 season he also won gold in the triathlon at the Australian Youth Olympic Festival and competed in two races in the 2009 ITU World Championship Series, finishing 13th in Kitzbühel and 27th in London.

[18] Despite a 15-second penalty, Jonathan took the bronze medal in the Triathlon event at the London 2012 Olympic Games, his brother Alistair taking gold.

He took gold in the mixed triathlon team relay at the 2014 Commonwealth Games, with his brother Alistair, Vicky Holland and Jodie Stimpson.

[19] At the 2020 Summer Olympics in Tokyo, Brownlee took the second-leg of the inaugural triathlon mixed relay, with Jessica Learmonth, Georgia Taylor-Brown and Alex Yee, and took the gold medal in a time of 1:23:41.

[21][22] In the five years from 2006 to 2010, Jonathan Brownlee took part in 23 ITU competitions and achieved 14 top ten positions, winning five gold medals.