But it is undeniable that O'Connor was built in Decathlon. An unlikely match, but there in his first year (2021) he rode the perfect
Tour de France where he won a high mountain stage and then held his own to finish fourth in GC. Improving on that was always going to be very hard but he diversified his palmarès over 2022 and 2023 with podiums at the Dauphiné and wins during big stage-races and a few one-day races too. In 2024, he was one of the best in the world...
Second at UAE Tour; fifth at Tirreno-Adriatico; second in the Tour of the Alps; fourth at the Giro d'Italia... And then a Vuelta a España where he took advantage of his underdog role to take a massive breakaway win on week 1 and worry every single GC rider for two weeks in the race. He went on to finish second in the overall classification, only behind Primoz Roglic, and he could've won it if it weren't for a few bad days. However perhaps even more impressive was his second place in the Zurich World Championships where he only placed behind Tadej Pogacar. He couldn't have realistically aimed for a better season, really.
Came 2025, the results simply weren't there. All spring long there wasn't any particular performance to point out, the Tour de Suisse saw him ride to seventh with a modest field and at the
Tour de France he didn't super high ambitions, he was content and relaxed. He set himself up for a Top10, which became unlikely as the race unfolded. He chased breakaway wins, failing on four occasions, but then... On the Col de la Loze stage, the queen stage of the Tour, he put out an O'Connor special, almost in typical fashion really.
The Australian rode to a solo win on the Tour's most difficult stage, getting caught from the early breakaway, attacking again before the final climb and then taking a solo win that also took him to the Top10. This looked certain, but then on the final 'competitive' day on stage 20, without mountains, he lost this Top10 to Jordan Jegat who was in the breakaway. Later in the season there weren't more results to show for, and so he ended a season that would've been a disaster if it weren't for that one day in the Alps.
Was it enough to save his season though? No. O'Connor's transfer was a miss, and there will be pressure for him to bounce back in 2026 specially as the team has lost a few other leaders including quality climbers.