He started his career after being elevated from the
rookie list by
Essendon in 2000, and made his AFL debut in 2001. The West Australian had been noted as an exciting midfielder and when he arrived at
Carlton as part of the Blues' refill of recycled players in the 2003 draft/trade period, he made a good impression during 2004. He broke his way into the team from Carlton's , the
Northern Bullants, midway through the year and played every game from then on. 2005 was another step up for McGrath, who played 19 games but was considered one of the better players in a dismal year for the Blues. He again played 19 games in 2006, generally playing a tagging role rotated through the midfield, where he is noted as a hard ball winner. Although less successful as a traditional defender, his tagging roles were often performed in the backline. Despite his good season, McGrath was delisted at the end of 2006, at the age of 27. ==Post-AFL==