Australian swim superstar Mollie O’Callaghan says she’s incredibly sad to withdraw from the looming Pan Pacific championships due to injury.

The five-time Olympic gold medallist won’t compete at the biggest global swim meet of the year because of a back injury.

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O’Callaghan carried the injury through the Commonwealth Games in Glasgow, where she won three gold medals in relay events and an individual silver in the women’s 100m freestyle.

“I’m incredibly sad that I’ve made the decision to pull out of Pan Pacs. FOMO is definitely getting the best of me,” O’Callaghan posted on Instagram.

“I’ve had to make the decision that is best for me.

“After every race (in Glasgow) I re-evaluated, adapted where I could, and did everything possible to keep moving forward.

“And I’m so proud of what I was able to achieve while managing this injury.

“I put myself out there, embraced a different challenge, and learned to adapt.

“I don’t regret racing at the Commonwealth Games for a second.”

O’Callaghan also thanked her team for helping compete at the Comm Games under the difficult circumstances.

“There are things I’ve done in training and behind the scenes that I never thought I’d be able to do. None of that would’ve been possible without the incredible people around me,” she said.

“To my team honestly thank you. Thank you for believing in me, guiding me and helping me navigate every hurdle.

“You’ve always had both the athlete I am today and the person I want to be long-term at the centre of every decision. It truly takes a village, and I’ll never be able to thank you enough.”

The Pan Pacs in California start on August 12 with O’Callaghan, who has dominated the 100m and 200m freestyle for the past four years, joining a batch of Australian big guns to miss the meet.

Champion backstroker Kaylee McKeown is sidelined by illness, while veterans Cam McEvoy and Kyle Chalmers opted to prioritise the Commonwealth Games over the Pan Pacs.

Dolphins coach Rohan Taylor said it was priority to give the superstars the rest and recuperation needed after their troubled spells.

Taylor was thrilled with the record haul from his team of 37 golds and 76 medals at the Tollcross pool as they build up for their assault on the Pan Pacific Games in California in less than a fortnight.

But he was concerned that their marquee athletes needed to be supported in their bid to be in the best shape possible for the Los Angeles Games two years hence.

“I think it’s a priority, and it’s also important that they know they have a great team around them,” he said.

“In the case of Kaylee and Mollie, and the team that works with them, we’ll be making sure that they get the rest and recovery they need, because absolutely, it’s about LA. 

“I’m very confident and there’s a bit of time to go. Both those girls have had had some things in the past and have navigated through and come out better. So it’s pretty exciting.”

Though Australia dominated in Glasgow in a fashion even unprecedented by their sky high standards in Commonwealth competition, Taylor was quick to concede that, compared to the tasks ahead at the Pan Pacs and next year’s world championships in Budapest, the Games represented “a lower standard meet”.

Indeed, if Australian swimmers recorded their Glasgow times at the Paris Olympics, they’d have won only two golds, Cam McEvoy in 50m freestyle and Sam Short in 400m freestyle, compared to the seven they annexed in the French capital.

Not that Taylor was too concerned by this, as he enthused about the “emergence of younger athletes to underpin and strengthen our relays”.

“The Americans are going to be as tough as nails on home soil, and there’ll be a lot of good Canadians and others to contend with, but two years out, there’s some growth in the team, from the youth and obviously our senior athletes maintaining.

“Our swimmers still had to perform at this meet, and the expectations are always high on the athletes and coaches. So to continue to repeat the success each night and build themselves was great.

“We are the best Commonwealth Games-performing team -- that’s fantastic, that’s a credit to the athletes and the coaches.”

Taylor was not underplaying the part, either, of billionaire Gina Rinehart’s cash bonus injection of over $1.2m for medal-winning swimmers in Glasgow.

“It’s a significant impact,” he said. “We need as much support as can be given to the athletes. I’m all for it, I’m supporting it one hundred percent. I didn’t do the maths, but that sounds pretty good.”