Played three, won three, but Dan Kelly's career in green is over at the age of 19.
The Leicester centre helped Ireland Under-20s to wins over Scotland, Wales and England before last season’s tournament was cancelled due to the Covid-19 pandemic.
But yesterday the Manchester-born back was named in Eddie Jones’ England senior squad for their summer Tests, where an appearance in any of their games would make him ineligible for Ireland.
The IRFU had hoped to develop the player within the Irish system but his breakthrough at Tigers and the fact that he studies at a local university have led him to pursue a career with his native country.
"It's obviously disappointing," Ireland Under-20s coach Richie Murphy said after he announced his squad for the upcoming Six Nations (all games live on RTÉ).
"We'll deal with the players that we have here and we have got some fantastic rugby players here.
"Obviously Dan is a loss. He was in our system last year.
"He obviously went back to Leicester and is in college over there. His life is around that area.
"Within the conversations that the IRFU have had with him, Dan has been very good.
"He really enjoyed his time with us but he feels that he needs to go in a different direction at the moment.
"We respect his decision and we move on from it."
Six of the 34 players named by Murphy yesterday had been with the U20s last season, among them Murphy’s son, Ben, a scrum-half at Leinster Academy.
The fact that he was featured in the squad last year, while Richie was still part of the senior set-up and not involved in the U20s, saved him some mild embarrassment.
"I suppose day one or two, it was probably a little weird when you look down and you see your son sitting there," said Murphy.
"Obviously we would have conversations at home when we are watching games live, but to have him in the group is definitely a little bit unusual.
"I suppose from my end, I'm probably glad he was there last year and that it wasn't me who was putting him into the squad. That made it a little bit easier.
"But yeah, he has just applied himself well. He stays away from me, he doesn't talk to me too much when we are in camp.
"If we have stuff that we need him to do, we go and do that. In fairness to him, he has been really professional about the whole thing. He just gets on with it."
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Fixtures (all games at Cardiff Arms Park)
Scotland v Ireland, Saturday 19 June, 2pm
Wales v Ireland, Friday 25 June, 8pm
Ireland v England, Thursday 1 July, 8pm
Italy v Ireland, Wednesday 7 July, 2pm
Ireland v France, Tuesday 13 July, 4.45pm.