|Date of birth||23 May 1980|
|Place of birth||Gold Coast, Queensland|
|Original team(s)||Broadbeach (AFLQ)|
Round 14, 9 June 2000, Brisbane Lions|
vs. Kangaroos, at Colonial Stadium
|Height||202 cm (6 ft 8 in)|
|Weight||102 kg (225 lb)|
1 Playing statistics correct to the end of 2007.
|Sources: AFL Tables, AustralianFootball.com|
Knobel, a ruckman originally from the Gold Coast, was recruited to the AFL in his home state with the Brisbane Lions onto their rookie list. He made his debut in 2000 after a rookie elevation. After getting his chance in Round 14, Knobel held his spot for much of the season, and played in two finals matches.
After fairly limited seasons with the Saints in 2002 and 2003, his 2004 season was much improved, playing all 24 games and becoming the Saints' number one ruckman. Despite his crash and bash ruckwork and tally of 460 hitouts for the year, he was criticised for his lack of around the ground work, averaging just 6 disposals in 2004.
In 2006, Knobel played just 3 games and found it hard for selection due to the form of All-Australian ruckman Troy Simmonds. Due to ongoing injury concerns Knobel was unable to play a senior game in 2007 and announced his retirement from AFL football on 28 August 2007.
- "AFL 2004 Wizard Cup Grand Final - Geelong v St Kilda". Slattery Media Group. 13 March 2004. Archived from the original on 16 July 2011. Retrieved 7 November 2009.
- "Archived copy". Archived from the original on 1 May 2006. Retrieved 2 November 2006.CS1 maint: archived copy as title (link)