Jonny Brownlee, a former Olympic triathlon champion and six-time world champion, says "it's over for professional sport". Former world and Olympic champion Jonny Brownlee has retired at the age of 36. The Briton won Olympic bronze at London 2012, silver at Rio 2016 and gold in the mixed relay at Tokyo 2020. He is also a six‑time world champion and won mixed team relay g... [1148 chars]