 In the same year, he won the Mel Whinnen medal for his best on ground performance in the South Fremantle Colts 2003 WAFL premiership side.He averaged 31 possessions for the season at Colts level.Jacob was part of the WA Under-18 National Championships squad, putting in two very good performances at the carnival, before injuring a calf and having a reasonably quiet 3rd game.