[1] As a rookie, Jamison began the 2007 season playing with Carlton's VFL-affiliate, the Northern Bullants.
Throughout the season, he played primarily on the opposition's best leading forward, often due to injuries to other key defenders.
[3] In Round 8, he kept Daniel Bradshaw of the Brisbane Lions goalless (who was second in the running for the Coleman Medal at the time), before injuring his shoulder late in the game.
In 2009, he continued to be a key member of Carlton's defence, before suffering a groin injury and missing the last month of the season.
He became recognised as one of the league's top defenders, and commentators at mid-season were speculating that Jamison was a front-runner for the full-back position in the All-Australian Team; however, he missed most of the second half of the season with a torn meniscus.