Souths' injuries forced Koloamatangi to move from second row this month, and the former NSW representative has excelled with a mind-boggling 494 metres across two games.
Koloamatangi outplayed Brisbane's Payne Haas and Wests Tigers prop Terrell May, two of the NRL's best middles, as the Rabbitohs posted two wins from as many games to hit their bye in form.
Since the start of last season, Souths have won eight of 14 games when Koloamatangi has started in the middle, compared with only five of 21 when he's been at his other position, second row.
Ahead of another big clash against James Fisher-Harris and the Warriors this week, Souths coach Wayne Bennett told Koloamatangi he'd be in the middle to stay.
"As Wayne said in the meeting this morning, he's played himself back into the middle for the rest of his career," said Souths forward Jai Arrow.
But Koloamatangi trimmed down to the leanest weight of his first-grade career in the hopes of playing the season at second row.
Even given his past two games of front-row supremacy, that's still the position the 27-year-old would prefer to play, but he says he's fine to line up wherever the sixth-placed Rabbitohs need.
"I think Wayne's played a massive part in giving me confidence. He knows my preferred position," Koloamatangi said.
"I'm getting older now. A lot of back-rowers at the end of their career move to the middle. If it's meant to be, it's meant to be. Whatever jersey Wayne puts on me, I'll play and I'm happy.
"As long as we're winning, I'll play wherever."
Koloamatangi's teammates want him in the middle, too.
"Obviously Keaon wanted to start in the back row, but he's so much better suited to the middle, just with the amount of work he gets through, the carries that he takes," Arrow said.
"He's pretty special in the middle. I actually don't even know why they moved him (from the middle) in the first place."
Souths will need Koloamatangi at his busy best as they enter a tough four-week block that features games against all of the top four: the Warriors, Canberra, Canterbury and Melbourne.
The Rabbitohs have already lost to two of those sides this season and are likely to be without Latrell Mitchell for at least the Bulldogs game, given his NSW duties.
But Souths will regain injured stars Cody Walker, Jack Wighton and Tyrone Munro in the difficult window.
"It's exciting," Arrow said of the month ahead.
"You always want to play the best teams and see where you're at and learn as much as you can. We're halfway through the year now. I feel like we're starting to play some good footy."
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