What happened to the former PE teacher who beat Manny Pacquiao?
The Australian delivered one of the biggest, most controversial upsets in modern times by outpointing Pacquiao in Brisbane.
The former PE teacher's life completely changed when he fought Manny Pacquiao in front of 50,000+ fans for the welterweight world title in 2017.
Especially when you consider the Filipino icon posted a Twitter poll asking fans who they wanted to see him fight; Amir Khan was top with 48 per cent while British foe Kell Brook was in second place with 24 per cent - Horn meanwhile got just 7 per cent.
When a showdown with Khan collapsed in the UAE, Pacquiao turned to the Australian. He was a relatively unknown name unless you lived in Australia or New Zealand.
Despite being 10 years younger, the Aussie was installed as a huge underdog to emerge victorious in his hometown and rightly so. Pacquiao's last three opponents were Jessie Vargas, Timothy Bradley and Floyd Mayweather compared to Randall Bailey, Rico Mueller and Ali Funeka for Horn.
Promoter Bob Arum said it was a treat for Pacquiao fans and promised it would be an entertaining fight for those tuning in.
Manny Pacquiao out landed Jeff Horn in 11 of the 12 rounds. Pacquiao out landed Horn, 182-92. #PacquiaoHorn
— CompuBox (@CompuBox) July 2, 2017
Pacquiao intended to trigger his rematch clause but later pulled out due to his commitments as senator in the Philippines.
It saw Horn make a successful first defence of his WBO crown with a stoppage win over Britain's Gary Corcoran but the Queensland star would relinquish the belt to Terence Crawford in his next fight at the MGM Grand in Las Vegas.