The English-born but Welsh reared Marmion has been a revelation since he burst on the scene last September 12 months.
Of course, the even more remarkable rise of Robbie Henshaw has meant Marmion, whose late father’s family is originally from Loughrea in Co Galway, has slipped through under the radar.
Marmion could only watch 12 months ago as Isaac Boss and Paul Marshall got the nod for Test games where Henshaw played his first two matches for Ireland and he is disappointed that injury has forced his friend to cry off this tour.
“It’s disappointing for Robbie and the squad but he will be back before too long,” said Marmion, who was the only player on the tour last year not to feature in either game.
He has just turned in another superb season for Connacht, starting 26 of their competitive games and coming off the bench in their other two.
It was the second season in a row that the 22-year old has played in every league game. I’m really looking forward to Argentina. I was thrilled to be called up last year but was disappointed not to get a cap but I returned home and just worked harder and thankfully it has led to being included again.
“It was good to get the experience of touring with the senior side and, of course, you just want to get back there again.
“It has been a good season. Pat (Lam) has changed the game plan and there is more use for the nine, but I’ve enjoyed it,” he added.
Marmion played for the Ireland Wolfhounds against England in Gloucester and is now hopeful of making the step up and get his first cap but with Conor Murray and Eoin Reddan also in the squad he knows it will not be easy.
“I want to push on from last year so hopefully the opportunity will come,” said Marmion.