If he's that talented he'll be a lot closer than three years.
Here's the current NRL hookers and the year they made their NRL debut, followed by the year they first played 20+ NRL games:
McInnes (20, 23)
Wallace (20 (in the halves), 23 (also in the halves))
Katoa (20, hasn't yet played 20+ NRL games in a season)
Egan (21, hasn't yet played 20+ NRL games in a season)
Luke (20, 21)
Roache (20, hasn't yet played 20+ NRL games in a season)
Tevaga (21, hasn't yet played 20+ NRL games in a season)
Smith, C (19 (in the halves), 20)
Smith, B (21, hasn't yet played 20+ NRL games in a season)
Cook (22, 26)
Farah (19, 21)
Friend (18, 19)
Baptiste (20, 25)
Radley (19, hasn't yet played 20+ NRL games in a season)
Godinet (24, hasn't yet played 20+ NRL games in a season)
Liddle (20, hasn't yet played 20+ NRL games in a season)
McIlwrick (21, 26)
Brailey (21, hasn't yet played 20+ NRL games in a season)
Segeyaro (22, 24)
McCullough (18, 19)
Griffin (22, hasn't yet played 20+ NRL games in a season)
Levi (20, 22)
Hodgson (20, 21 (both years in the UK))
Havili (21, hasn't yet played 20+ NRL games in a season)
Koroisau (22, 25)
Lichaa (21, 22)
Marshall-King (22, hasn't yet played 20+ NRL games in a season)
Granville (24, 26)
Peats (21, 21)
Rein (21, 22)
Pritchard (19, hasn't yet played 20+ NRL games in a season)
King (19, hasn't yet played 20+ NRL games in a season)
Schneider turns 19 next year.