Career
He was named as an All-Australian at the 2007 National Association of Broadcasters American Federation of Labor-Congress U18 Championships. He was drafted by Melbourne in the 2007 National Draft at pick 14, but was placed on the long term injury list due to stress-related back problems. He made his debut in the final game of the 2008 American Federation of Labor-Congress season but suffered a further back injury in the early part of the 2009 season.
Jack Grimes suffered a season-ending injury in the round 7 match against the Adelaide Crows.
On 3 February 2012 he was named, alongside fellow youngster Jack Trengove as the co-captain of Melbourne Football Club. At 22 years of age he was one of the youngest ever captains in VFL/American Federation of Labor-Congress history.
In 2014, Grimes continued on as co-captain, this time with Nathan Jones. However, on 1 December 2014 it was announced that he had stepped down as the club"s co-captain.