In our latest series of Irish rugby XV pieces, we have taken a look at those fortunate, or unfortunate, souls, who have but a single cap to their name.
Regardless of their 'one cap wonder' tag, they have all come close to the pinnacle of the game and have achieved their rugby dream of pulling on their country's jersey.
For this team we have kept it to relatively recent players, as the info and footage grows thin the further back you go.
Jeremy Loughman - Loose Head Prop
The Reno born prop was making serious inroads at Munster and with Ireland - he won his first cap during the autumn against Fiji - before a poorly timed injury put paid to his Six Nations chances, where he would likely have seen game time.
His return to fitness has coincided with Munster's upturn in form, and will be looking to make the World Cup squad ahead of his teammate Dave Kilcoyne.
He is the most likely man in this XV to get a second cap.
Mike Sherry - Hooker
Sherry first came to prominence with Ireland when he received an unexpected call-up to the 2011 World Cup squad as a 23-year-old.
He was capped by the Wolfhounds in 2012 but had to wait another year until his full debut against the USA during the 2013 Summer tour.
Other than a brief loan spell at Gloucester in 2019, he played with Munster his entire career.
Ronan Loughney - Tight Head Prop
Loughney packed down on both sides of the scrum for Connacht during his 11 year career with the province.
The Galway man received his one and only cap during the summer of 2012, in rugby's toughest environment - away to New Zealand.
Fineen Wycherley - Lock
The 25-year-old is still trucking away at Munster, but will find his opportunities increasingly limited with the talent coming through in the back five of the pack.
He came on as a replacement in Ireland's 71-10 victory over the USA in 2021.
Billy Holland - Lock
A certified legend in Munster, Holland is probably the most deserving of his sole Ireland cap out of any of these 15 men.
After years of the grind, he finally pulled on the senior Irish jersey against Canada in 2016.
Robin Copeland - Blindside Flanker
Copeland's athleticism and ball carrying was perfectly suited to the Pro 12 and Pro 14, when, from relative obscurity, he hit a rich vein of form with the Cardiff Blues before being picked up by Munster in 2014.
His only cap came against Georgia in 2014, and he is still togging out in the Pro D2 for SA XV Charente, but he will be retiring at the end of the season.
Cian Prendergast - Openside Flanker
The signing of Prendergast to the Connacht academy was a game changing move for both parties, as it saw him accelerate up the provincial and international pecking order.
Like Loughman, he made his debut against Fiji last November, and will likely add to his single cap.
Roger Wilson - Number Eight
"It's all motivation for me, but I still wonder sometimes does the face not fit. If you don't know what I mean by that I suppose you should ask Roger Wilson how he has one cap for Ireland and Jamie Heaslip has 60 and two Lions tours behind him."
The infamous 'face does not fit' comments from Darren Cave show how highly Wilson was rated among some of his peers.
While Cave's Jamie Heaslip comparison is a tad ropey, Wilson's sole cap against Japan in 2005 is not reflective of his talents.
Caolin Blade - Scrum Half
Blade is in the midst of the best form of his career for Connacht, and is unfortunate that Ireland's depth has kept him from adding to his one cap tally.
This cap also came in the 71-10 hammering of the USA.
Given that he was called up to the Six Nations squad, a World Cup place would not be out of reach were injuries to hit any of those higher up the pecking order.
Mike Lowry - Out Half
Not his more comfortable position of fullback, but he has filled in well here on a number of occasions for Ulster.
Hasn't capitalised on an outstanding breakout year in 2021/22, and will probably be looking at post-World Cup for an opportunity to add to his single cap.
Put in one of the best debuts of anyone in this side, with two tries and an assist against Italy in the 2022 Six Nations.
Matt Healy - Left Wing
The former scrum-half epitomised the exhilarating brand of rugby that Connacht conjured up in their title winning season of 2015/16.
Off the back of these performances, Healy won his lone cap during the 2016 summer tour to South Africa.
Noel Reid - Inside Centre
One of the best passers of a ball during his time at Leinster, and the perfect foil for the hard running Ben Teo, with whom he formed a successful partnership in the midfield.
Received his well earned cap on the 2014 tour to Argentina.
Rory O'Loughlin - Outside Centre
An underrated player outside of Leinster, with the ability to fill in on the wing or in the centre at a Champions Cup level.
Was capped against Japan in 2017 and now plies his trade in the Gallagher Premiership with Exeter.
Adam Byrne - Right Wing
Injuries have been cruel to this man, but he can hold his head high for his Champions Cup and league performances, and his Ireland cap which he won in November 2017 against the Argies.
One of the best under the high ball Ireland has produced, and while his move to Connacht has not worked out, he is still only 29-years-old with a lot more to give to the game.
Mike Haley - Full Back
His performances for Munster have deserved more than a single cap, won against Italy in 2019.
Ireland are still searching for a bonafide back up to Hugo Keenan, so it is surprising he has not been given an opportunity in so long.