The coach has stuck by his plan to give all of his South Africa squad playing time and expose new players to quality opponents, and he's walking the walk.
The unbeaten Springboks could win the Rugby Championship in Argentina's backyard with a game to spare.
Erasmus made 10 changes between the Australia Tests last month and came up trumps, and made another 10 this week when there was no logical reason to with the championship on the line.
Even with a two-week break between games, he rested seven players who appeared in the Rugby World Cup final last year, including captain Siya Kolisi; left at home breakout No.10 Sacha Feinberg-Mngomezulu; and has placed in the reserves Eben Etzebeth, who is one cap shy of tying Victor Matfield's record for Springbok Tests.
Already blessed with a great number of World Cup winners, Erasmus says he keeps rotating the Springboks to develop at least two, ideally three excellent players in every position in a bid to win an unprecedented third successive World Cup.
The depth Erasmus has already grown was abundantly showed off this month against their greatest foe, New Zealand. In both games, the Springboks trailed at halftime but hung tough to clinch wins in the 74th minute in Johannesburg and 73rd in Cape Town.
Siya Kolisi crashes over during South Africa's second-Test win over New Zealand. (AP PHOTO)
What Erasmus has gambled on against the unpredictable Pumas in Santiago del Estero remains a formidable line-up but starts with almost 100 caps less than Argentina. They are tasked with clinching South Africa's first Rugby Championship since 2019, and first full championship since 2009.
South Africa have been so long without the title that half of Saturday's squad have never won the trophy. Of those dozen players, six are World Cup champions.
"(The championship title) would give more credit to what the squad has built up over the last few years," prop Ox Nche said.
"A lot of teams have a tendency to be inconsistent at times, but after winning the Rugby World Cup we feel we are getting better and tighter as a unit, and winning the competition would amplify what we want to achieve as a team."
The Pumas are also highly motivated for their last home game of the year. They have an outside chance at a championship title they have never won and will have to beat South Africa twice.
The record 67-27 demolition of Australia two weeks ago says they can do it but their inconsistency makes it doubtful. The Pumas have split tests this year with France, New Zealand and Australia.
"Everything starts and ends with the forwards," Pumas coach Felipe Contepomi said.
"We know what South Africa does and they do it very well. The key will be to impose our game over theirs. They are two-time world champions and they do it in a spectacular way."
There's other history on offer for the Pumas, too. Only two other nations have beaten the Springboks, All Blacks and Wallabies in the same year: England in 2002 and 2003 and Ireland in 2016 and 2022.
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