Editing Leigh Diffey (section)

== 2003–2012: Speed Channel and return to Network Ten ==
In 2001, Diffey moved to the US to cover the American-based open-wheel racing [[Champ Car|CART]] series,<ref name="Bio"/> while still working for the BBC.<ref>{{cite web|url=http://news.bbc.co.uk/sport1/hi/motorsport/1528436.stm|title=BBC Sets Speed Trap|work=BBC Sport|date=6 September 2001|access-date=29 November 2017|archive-url=https://web.archive.org/web/20030302003329/http://news.bbc.co.uk/sport1/hi/motorsport/1528436.stm|archive-date=2 March 2003}}</ref> Two years later in 2003, Diffey made a full-time move to the States when he was hired by [[Speed (TV network)|Speed Channel]], which later simply became "Speed".<ref name="SpeedCafe Leigh">{{cite web|url=https://www.speedcafe.com/2011/09/08/diffey-part-of-speed’s-bathurst-and-gold-coast-coverage/|title=SPEED USA at Bathurst and Gold Coast|work=Speedcafe.com|date=8 September 2011|access-date=29 November 2017|archiveurl=https://web.archive.org/web/20180804044730/https://speedcafe.com/2011/09/08/diffey-part-of-speed%E2%80%99s-bathurst-and-gold-coast-coverage/|archive-date=4 August 2018}}</ref> At Speed, Diffey was the play-by-play announcer for the network's coverage of the [[Pirelli World Challenge|Speed World Challenge]], the [[American Le Mans Series]], the [[Rolex Sports Car Series]],<ref name="NBC Bio"/> the [[Continental Tire SportsCar Challenge|Rolex Grand-Am Cup]],<ref name="NBC Bio"/> the SCCA [[Trans-Am Series]], and a regular anchor of ''[[Speed Center|The Speed Report]]'' and ''[[Speed Center]]''.<ref name="NBC Bio"/> Diffey occasionally filled in for Speed commentator [[Bob Varsha]] during the network's [[Formula One]] broadcasts.<ref name="NBC Bio"/> He also commentated selected rounds of the AMA Superbike and [[AMA Motocross Championship]]s.<ref>{{cite press release|url=http://www.motorcycle-usa.com/2009/02/article/ama-pro-racing-show-on-speed-channel/|title=AMA Pro Racing Show on Speed Channel|work=AMA Pro Racing|publisher=MotoUSA.com|date=18 February 2009|access-date=29 November 2017}}</ref>

Diffey worked with Speed to call several sports car races during his tenure with the network, including the [[24 Hours of Daytona]]<ref>{{cite press release|url=https://www.motorsport.com/grandam/news/broadcast-schedule-for-daytona-24/|title=Broadcast schedule for Daytona 24|work=Speed Channel|publisher=Motorsport.com|date=25 January 2005|access-date=29 November 2017|archive-date=1 December 2017|archive-url=https://web.archive.org/web/20171201034207/https://www.motorsport.com/grandam/news/broadcast-schedule-for-daytona-24/|url-status=dead}}</ref> and the [[24 Hours of Le Mans]].<ref name="NBC2012Press"/> During this time, Diffey also worked with Network Ten in Australia as a regular host for the network's nightly sports wrap, ''[[Sports Tonight (Australian TV program)|Sports Tonight]]''.<ref name="SpeedCafe Leigh"/> He also covered other two other sports for the Australian network: sailing, hosting coverage of the [[Sydney to Hobart Yacht Race]],<ref>{{cite web|url=http://www.criticalcomms.com.au/content/industry/news/satellite-phone-company-to-sponsor-yacht-race-766749324#axzz50EKGcyeP|title=Satellite phone company to sponsor yacht race|publisher=Comms Critical|date=22 December 2004|access-date=3 December 2017}}</ref> and golf,<ref>{{cite book|title=Tour Confidential: A Golfer's Life on the Global Stage|last1=Porter|first1=Ewan|author-link=Ewan Porter|date=1 November 2013|publisher=BookBaby|isbn=978-1-4835-1153-5|quote=My services were requested upon the completion of play at the Channel 10 commentary box where host, Leigh Diffey, spent 15 minutes asking me all about my dramatic day.}}</ref> which he covered for five years.<ref>{{cite web|url=http://www.statesman.com/sports/pro-sports/nbc-leigh-diffey-calling-the-olympics-nothing-compares-this/B39nZg9zcBk6e2lzgUWOdK/|title=NBC's Leigh Diffey on calling the Olympics: 'Nothing compares to this'|work=[[Austin American-Statesman]]|publisher=Cox Media Group|last=Doolittle|first=Dave|date=20 February 2014|access-date=3 December 2017|archive-date=4 December 2017|archive-url=https://web.archive.org/web/20171204114555/http://www.statesman.com/sports/pro-sports/nbc-leigh-diffey-calling-the-olympics-nothing-compares-this/B39nZg9zcBk6e2lzgUWOdK/|url-status=dead}}</ref> In 2011 alone, he covered no fewer than sixteen individual divisions of motorsport on Speed.<ref name="SpeedCafe Leigh"/>