Eddy grew up in Gippsland, Victoria and attended Caulfield Grammar School in Melbourne.

[1] He was an elite ball winner at junior level, averaging 27 disposals per game for Gippsland during the 2006 TAC Cup season.

He made his debut in Round 13 and kept his spot in the side for the rest of the season, including 3 finals appearances.

He won 12 disposals per game for St Kilda in 2008, but it was his defensive pressure that impressed as he laid the third most tackles of any player during his time in the side.

Eddy played 10 games in the 2009 season, with St Kilda qualifying in first position for the finals series, winning the club's third minor premiership.