Not sure of this but if my memory is correct I think Matt Carr may have been a late developer so maybe this is what the recruiting team have taken into consideration and seen some similarities in his son.
Recruited by Collingwood as an 18 year old in 1996, 2 seasons, no games, back to East Fremantle in 1997, drafted to St Kilda in 1998 Pre Season Draft, another year in reserves and then debuted in 1999 at age of 21 and played 28 games in 2 seasons for St Kilda before being traded to Fremantle at 2000 Draft in exchange for Craig Callaghan, interesting trade.
Debuted for Fremantle at age 23 and then played 136 games between 2001 and 2008. I've just lifted these facts from Wikipedia but Matthew's development does seem similar to Jaren's so he could be a surprise packet.
