At just 14, the strong bodied Sylvia made his debut for the Merbein seniors in the Sunraysia Football League. He was a member of Merbein's 2002 premiership side.
As an 18 year old, Sylvia moved to Bendigo to advance his junior football and chances of being drafted into the AFL.
Sylvia entered the 2006 season coming off solid form in the Pre Season, and is regarded as one of the most talented young players in the league.
Heading into the finals, many Demon fans had been disappointed with Sylvia's progress throughout the 2006 regular season, although he has shown in glimpses that he can become a topline player in time, however the Demons have selected him on and off in the senior side mainly due to not knowing where to put him. His lack of height makes him unsuitable for a key position, though he takes a strong overhead mark. Yet he does not excel in the midfield. Sylvia has been used by the Demons at times in both defence and attack with mixed results.
In Round 14 2008 Sylvia kicked a career best 4 goals in Melbourne's thrilling one point win over the Brisbane Lions.