Essendon Bannister made his debut for the
Essendon Football Club in Round 12, 2001 against
Adelaide. He was delisted by Essendon at the end of the 2003 season, and decided to re-nominate for the
national draft. Bannister played for Essendon 2001 from 2003 for a total of 14 games 0 goals.
Carlton he was selected by the
Carlton Football Club in the
national draft with its sixth round selection (#69 overall). He made his debut there in Round 1, 2004 against
Fremantle. He was noted as a hard-running defender, often taking tagging roles on mobile forwards, and he polled two
Brownlow Medal votes against Collingwood in a shut down role against Nathan Buckley. He struggled for regular selection in 2005, finally breaking through for a regular berth in mid-2006, playing ten out of eleven games before being suspended by the
AFL Tribunal. Bannister began the 2007 season playing with Carlton's , the
Northern Bullants, and it appeared that he would struggle for selection under Carlton's youth policy. He was brought back to the seniors against the hard-running
Western Bulldogs, and made an immediate impact with consecutive shut-downs of
Brad Johnson and
Chad Cornes, ensuring his position in the team for the rest of the year. He played the first five games of 2008, but was struck down by injury and was unable to regain his position in the team for the rest of the year. In 2009, Bannister was unable to break into the Carlton senior team on a regular basis, playing only two games for the year. He was a member of the Bullants' losing grand final team in 2009. Bannister was delisted from the Carlton Football Club at the end of the 2009 season. Bannister played for Carlton from 2004 until 2009 for a total of 53 games and 17 goals. In 2015, Bannister revealed during the 2007 season of how his former senior coach
Denis Pagan urged him to enjoy the second half of Carlton’s Round 16 clash with Brisbane at the ‘Gabba because it would be the last of his AFL career. “He told me at half-time of that game I’ve had enough chances and son, that will be your last one, go out and enjoy the second half. That’s done’,” “Which, really rattled me because I knew Denis was a man of his word. Luckily enough, something happened a day later ...” Pagan was sacked as senior coach of Carlton and
Brett Ratten took the reins, “Ratts straight away came up to me, because he’d heard what had happened and a few of the boys had too He said: ‘I’m going to play you every game for the rest of the season”. ==Umpiring career==