BIO:He is best known as an ALMS driver with Dyson Racing, but he has also driven for the Bentley factory team at Le Mans in 2001 and 2002, for the Cadillac team at Le Mans in 2000 and for Panoz at Le Mans in 1999. Leitzinger has also driven in the GT classification for Risi Competizione at Le Mans in 2003. Butch was also named 2002 Rookie of the Year in the Trans-Am Series. Butch will be driving the Alex Job Racing # 81 Porsche GT3 car in the American Le Mans Series GTC class for the 2010 season along with Juan Gonzalez.




Leitzinger shared the 1999 United States Road Racing Championship (USRRC) championship with teammate Elliott Forbes-Robinson and won the famed Rolex 24 at Daytona: twice with Dyson Racing, and once in a Nissan 300ZX co-driven with Scott Pruett, Steve Millen and Paul Gentilozzi. At the beginning of their involvement in ALMS, Leitzinger and the Dyson team fielded Ford-powered Riley & Scott cars but switched to the newer MG-Lola EX257 midway through the 2002 season. Dyson Racing achieved its first ALMS victory in the car when Leitzinger and James Weaver scored an overall win at Infineon Raceway in Sonoma, California. This also marked the first time that an LMP675 (now called LMP2) class car scored an overall win in an ALMS race. Leitzinger ran three NASCAR Winston Cup races at Watkins Glen with a best finish of 12th in 1995. On June 24, 2007, Leitzinger ran the NASCAR Nextel Cup race at Infineon Raceway in the Bill Davis Racing-owned #23 Caterpillar Toyota and finished 28th.