Australian swimmer Isaac Cooper has voluntarily stood down from the team's athlete leadership group after missing the final night of competition at the 2026 Commonwealth Games in Glasgow to go drinking instead.

Cooper, 22, was absent from the closing session of the swim meet at Tollcross International Swimming Centre and skipped the team's wrap-up meeting that followed. According to the Sydney Morning Herald, he was seen drinking at Australia's team headquarters — a shared space used by athletes from across all sports — while his swimming teammates were still competing. The Guardian later reported the same account, attributing it to the Herald's original reporting by journalist Tom Decent.

Swimming Australia confirmed that Cooper's absence conflicted with team expectations. Swimmers who were not competing were expected to support their teammates poolside before attending the final team meeting that evening. Cooper also missed a training session the following day.

The timing was awkward for head coach Rohan Taylor, who had recently praised Cooper's maturity, telling reporters: "He's grown up in himself."

Cooper's Glasgow meet was mixed. He qualified eighth for the 100m backstroke final after Tuesday's semi-final but withdrew from Wednesday's final after swimming the heats of the men's 4x100 medley relay. He finished sixth in the 50m backstroke final and collected a gold medal from the relay after his teammates won the final without him.

There was no formal ban on drinking. The Australian team did not impose alcohol restrictions or curfews on athletes once their competition had finished. Cooper's breach was not of a written rule but of the expectation that swimmers support teammates and attend team commitments.

This is not Cooper's first off-pool setback. He was sent home from a pre-Games camp ahead of the 2022 Commonwealth Games in Birmingham for what were described as wellbeing challenges, including the use of medication, and missed that meet entirely. He has since rebounded to win gold in the 50m backstroke at the 2024 World Championships in Doha and has appeared at two Olympics.

The broader Australian team had a Games to remember, setting a record 37 gold medals across all sports in Glasgow.

Officials decided against sending Cooper home from the team's onward trip to the United States. He travelled with the squad and remained eligible to compete at the Pan Pacific Championships in Irvine, California, beginning 12 August 2026. Swimming Australia said he would be monitored closely during his time there.