His pathway is one that is being increasingly trodden, as boys who stand out in the First XV, especially in Auckland's 1A system, move into their provinces and, if they are good enough, the New Zealand Under 20s.
"The 1A is a standard of footy that can't be matched, really, just with the quality of players in the Auckland region. It was the best decision for Josh and I to go to MAGS for our schooling and rugby."
He has fitted in three games in 2015 with his Lincoln University club, which, much like Waikato University in 2014, has counted no less than five of the Under 20s. The two Goodhues are joined by Mitch Dunshea, while Tom Hill and Hamish Dalzell were late omissions from the final cut.
The Under 20s' backline is full of versatility and interchangeability, but Goodhue's hopes of a starting berth, likely at centre rather than one-in, are helped by the late withdrawal of Anton Lienert-Brown and the unavailability of Rieko Ioane. Goodhue lined up outside Auckland's TJ Faiane, another old First XV foe, against the Chiefs Development XV on Monday, and saw plenty of game time in the Oceania Junior Championship earlier this month. The likes of Vince Aso and Nathaniel Apa can also slot into the midfield too.
"He's a good player," says New Zealand assistant coach Leon MacDonald of Goodhue.
"He's got a left boot, too, which is handy. He's a big lad, around 100kg, and a strong defender. I can see why there's a lot of interest around the country in his playing ability."
Goodhue, like all the team, is champing at the bit to launch into the campaign and Italian culture.
"You can tell the boys from last year are going over there with a purpose. They are focused on the task at hand."
Those birthday celebrations can wait, though, and on the night of the final on June 20, that cake may just taste even sweeter and richer.