Dempsey enjoys auto racing in his spare time, having competed in the 24 Hours of Le Mans, Rolex 24 at Daytona sports car race, and Tecate SCORE Baja 1000 off-road race. He was a co-owner of the Vision Racing IndyCar Series team and current owner of Dempsey Racing, which is presently racing two Mazda RX-8 cars in the GRAND-AM Rolex Sports Car Series GT class. He participates in this series as often as his schedule allows, as he is unable to race while filming a movie due to insurance issues. In 2009, he raced a Team Seattle Advanced Engineering Ferrari F430 GT in the 2009 24 Hours of Le Mans’s GT2 class, and finished ninth in class.
Dempsey announced he would be in the 2011 Rolex 24 at Daytona along with other races throughout the season in a Mazda RX-8. Dempsey finished in third place in the GT Class of the Rolex 24 at Daytona.
Dempsey race car in 2012
In 2012, Dempsey will compete in the Grand-Am Continental Tire Sports Car Challenge behind the wheel of an Aston Martin Racing-Multimatic Motorsports Aston Martin Vantage GT4, which, after 5 successful racing seasons in Europe, will be making its debut on American tracks.
Dempsey also formed the Dempsey Racing team which competes in the American Le Mans Series. The team fields a full-time Oreca FLM09 in the Prototype Challenge class as well as a Lola B12/80 coupe in the Prototype 2 class (with Patrick himself driving) from Laguna Seca onward.
Dempsey is also known to have a collection of sports and collector cars.
Source : Wikipedia
A lead driver and owner of Dempsey Racing, Patrick Dempsey is in his fourth full season of GRAND-AM Rolex Sports Car Series GT class competition in the No. 40 VISIT FLORIDA/ModSpace/Construct Corps/Dempsey Racing Mazda RX-8 GT. He co-drives with teammate and Dempsey Racing business partner Joe Foster, and the two have been racing together for seven years after first meeting when Foster was Dempsey’s racing school series instructor. Dempsey is one of today’s top television and film actors and stars in ABC’s Grey’s Anatomy in addition to popular films such as Can’t Buy Me Love, Enchanted, Made of Honor and the upcoming Flypaper and Transformers: Dark of the Moon.
2011 – Joined Foster and teammates Charles Espenlaub and Tom Long in finishing a career-best third in the Rolex 24 At Daytona. All four drivers led the race, including a career-high 28 laps led for Dempsey.
2010 – Joined Foster and teammates Espenlaub and Scott Maxwell for the season-opening Rolex 24 At Daytona where the No. 40 Mazda RX-8 GT finished sixth. The result was Dempsey Racing’s best Rolex 24 finish to that point, and also matched Dempsey’s previous career-best race finish. Raced in only the year’s opening events while filming movies during the summer.
2009 – Finished a career-best sixth in Rolex Sports Car Series GT race at Mid-Ohio with Foster in the No. 40 Dempsey Racing Mazda RX-8. Also joined Foster and Don Kitch Jr. in a ninth place GT2 finish at the 24 Hours of Le Mans.
2008 – Contested nine Rolex Series GT races, earning a season-best result of ninth at Montreal with Foster.
2007 – Debuted in Rolex Series GT competition at Miller Motorsports Park with Foster and Espenlaub in the No. 40 Mazda’s first race. Also ran seven GRAND-AM Continental Tire Sports Car Challenge races with a series career-best finish of sixth with Espenlaub at Homestead-Miami Speedway.
2006 – Made five Continental Tire series starts.
Early Career – 2005: Racing included the Toyota Pro/Celebrity Race in Long Beach, Mazdaspeed Miata MX-5 Cup and the Panoz GT Series. Also competed in the Baja 1000 in a BC-class dune buggy. 2004: Competed in the Panoz GT Series as a graduate of the Panoz Racing School. First competitive driving experience was a three-day Skip Barber Racing School course that was a gift from his wife.
Source: Dempsey Racing