It's early days in the Test career of Leinster's Jimmy O'Brien, but the Kildare man is already proving himself to be Ireland's Mr Versatile.
In four Irish games, he's played across three different positions, his caps bookended by substitute appearances in the centre against South Africa and Italy, either side of starts at full-back and left wing.
Crucially, he's looked comfortable in whatever jersey he's worn.
His cameo against Italy was a brief one, replacing Stuart McCloskey in the final eight minutes, but he proved himself more than capable at outside centre on his debut against the Springboks, when he also replaced the Ulsterman midway through the first half.
Back at Leinster, he's just as familiar on the right wing, starting in the 14 shirt in every one of last season's Champions Cup knockout games.
"I haven't gone at 9 or 10 yet, only for Leinster! Give it time!" he laughs, when asked about his role as Ireland's swiss-army knife.
"Centres, each wing, full-back, yeah."
While some people see versatility as a sign that a player hasn't nailed down one specific position, the 26-year-old doesn't see it that way.
"Growing up, when I was playing a couple of positions people [would speak] as if it's going to work against you or whatever, but I think now it works for me," he said.
"I'm the kind of guy who can play multiple positions and I need to lean into that, that's my strength. Just make sure I know every position.
"The other day, if I got put in wing, 13 or full-back; I'd know it."
Being a jack-of-all-trades is far from the easy option. At the top level of rugby, each position comes with its own set of homework, detailed analysis of how the opposition line up and move in attack and defence.
As a result, covering each wing, centre and full-back brings a lot of research, the most demanding of which comes at outside centre.
"We saw at the weekend against Italy that their attack was very good and the amount of lines of running they had in the outside channels, [Ange] Capuozzo is so quick, their wingers, they kept [Lorenzo] Cannone out in the 13 channel and that's so hard to defend. You definitely have to think about it mostly defensively.
"At 13, there's a lot of different reads: front-door, back-door, you have to know their set-plays because they're usually trying to expose 13 off set-plays. It's the hardest place to defend.
"On the wing, if you're playing high, coming up, then that's slightly different positioning and then full-back and wing it's about where all their kicking threats are; who is left, right footed, where they exit, when to close.
"When you go to 13, I'm not thinking about who is left-footed, right-footed or how they clear; more so how they're going to attack. You study all of them during the week; trying to get to know each one.
"I train them a couple of times each week, that helps but you just go back to trusting how you defend on the wing and trusting what you've done in training."
As well as having a bank of research to get through during the week, O'Brien has also become used to putting it into practice at the last minute.
For his first cap against South Africa, injuries to Robbie Henshaw and McCloskey saw him play 55 minutes of a game in which he hadn't even been named in the matchday 23 initially, while his first Six Nations appearance at the weekend followed a similar pattern, promoted to the bench on Friday afternoon after Garry Ringrose failed to recover from a calf problem.
"Yeah, I'd be pretty laid back," he says.
"You just do your best routine, next-man-up focus and you're doing the same training as all of the rest of the lads, so you don't feel discounted from the 23 anyway, I feel.
"Once they tell you you're playing, you just switch into the game and have that mindset.
"It's [the Six Nations], something you grew up watching, it was cool to play, I found out late in the day; similar to my first cap as well.
"Thankfully, my parents had booked the trip anyway and were going over regardless of whether I got in the squad.
"I saw them straight after the game, it was class. When I got called in late I didn't know if family could be there and that would have been disappointing after, it was cool."
He'll have to be prepared to step in at Murrayfield too.
McCloskey and Ringrose are both carrying knocks, as is James Lowe, and while Paul O'Connell yesterday said he expects those injuries to have healed in time for next week's round four game against Scotland, O'Brien's versatility would make him s strong contender for a place in the squad should any of those players suffer a setback.
And he's already started doing his homework on the Scots, whose backline have impressed during their three games to date.
He sais: "Finn Russell is obviously a quality player, we've played him twice with Leinster this year and he scored that one try away where he broke the line, got an offload to Christian Wade and then got us a couple of times in the Aviva.
"He's unbelievable in attack, he has the long-range passing, his kicking game, everything.
"It's about being on the whole time, they can attack from anywhere; with two passes they can go from one side of the pitch to another.
"The backs especially are working hard off the ball, they're a big challenge."
"Huw Jones, I've played against him a few times 13 v 13 and in attack he's unbelievable.
"He's good feet, he's bigger and quicker than you'd think. He's a very good player, playing unbelievable at the moment in this Six Nations.
"Van der Merwe, he's just massive, fast; a big-ball carrier. You try to hit him and you go 'yeah', he swerves in and out, very hard to tackle.
"I remember I first played Edinburgh, I was full-back and he was on the wing and I tried to hit him and he was like steel.
"So, yeah, it will be tough. A big challenge."
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