|Date of birth||9 April 1987|
|Original team(s)||Rosebud / Dandenong Stingrays|
|Debut||Round 19, 12 August 2006, Port Adelaide
vs. Western Bulldogs, at Marrara Oval
|Height||187 cm (6 ft 2 in)|
|Weight||83 kg (183 lb)|
|2006–2008||Port Adelaide||21 (6)|
1 Playing statistics correct to the end of 2009.
|Sources: AFL Tables, AustralianFootball.com|
Recruited from Rosebud and the Dandenong Stingrays, he was placed on the Port Adelaide Football Club's rookie list but was upgraded to the senior list during 2006. Bentley played his first AFL game on 12 August 2006 against the Western Bulldogs in Darwin and he kicked a goal with his first kick in the AFL. He was allocated to Sturt in the SANFL when not selected for Port Adelaide, and wore jersey number 22.
Bentley was delisted by Port Adelaide at the end of 2008 after twenty-one games with the club. He was drafted as a rookie by the Carlton Football Club with its third selection (#37 overall) in the 2009 AFL rookie draft. He made his Carlton debut in Round 6, and played five games for the season, before being delisted at the end of the season.
Bentley made a return to local football in 2010 returning to his old home club, Rosebud, in the Mornington Peninsula Nepean Football League, and in 2011 he was the joint-winner of the George Osborne Medal as the Nepean division best and fairest. Bentley remains at Rosebud as of 2015.
- "George Osborne Medalists, Ben Holmes, Rye & Greg Bentley, Rosebud". Sportingpulse. 13 September 2011. Retrieved 10 June 2012.