In 2006 he played every game for the club, following shoulder reconstructions which kept him out of the side in most of both the 2004 and 2005 seasons.
Playing as a midfielder he finished runner up to Shane Woewodin in East Fremantle's best and fairest award, the Lynn Medal in 2006.
[1] During the 2007 season, Foster was elevated to the Fremantle senior list as a replacement for Justin Longmuir, who was placed on the long-term injury list.
[1] After being named as an emergency for the round 18 Western Derby, he finally made his AFL debut the following week against Essendon at Subiaco Oval.
[2] On 21 April 2009, it was revealed that Foster and teammate Clayton Hinkley had conducted pranks on teammates whilst dressed up in what was described by Fremantle's development coach Steve Malaxos as Ku Klux Klan costumes.