Guillermo "Memo" Rojas Jr. (born August 18, 1981) is a Mexican professional race car driver. Successful in American sports car racing, Rojas is a four-time series champion in the Rolex Sports Car Series, a three-time winner of the 24 Hours of Daytona, and a two-time European Le Mans Series champion. He is the first Mexican driver to win a major American racing championship. Personal life Rojas was born in 1981 in Mexico City, Mexico. He is son of the Mexican driver Guillermo Rojas Sr. Career Early career Rojas began his racing career in 1993, racing karts; in 1996 he moved up to professional racing in the Mexican Formula Two series. Heading to the United States in 1997, he joined the Barber Dodge series, before returning to Mexico in 1998 to race for two years in the national Formula Three series. Returning to the United States in 2000, he spent two years racing in the American Formula Ford 2000 series, before moving up to the Barber Dodge Pro Series for the 2002 and 2003 seasons, claiming two wins during his time in the series, and finishing second in the series championship in 2003. He then graduated to the European Formula Renault series with DAMS in 2004, scoring two top-five finishes over the course of the year. In 2005 he returned to the United States, racing in the Toyota Atlantic championship series for a single race at the Fundidora park circuit in Monterrey. Grand-Am Switching from open-wheel racing to sports cars in 2007, Rojas joined Chip Ganassi Racing to compete in the Grand American Road Racing Rolex Sports Car Series, as a teammate to Scott Pruett. Claiming his first win in the series in 2007, Rojas won his first 24 Hours of Daytona endurance race the following year with co-drivers Pruett, Juan Pablo Montoya and Dario Franchitti. The victory propelled Rojas and Pruett to the Rolex Sports Car Series championship that year, setting a series record for the most victories in a season with six wins over the course of the year. In 2009, Rojas would finish second in the Rolex Sports Car Series championship standings, only six points out of first place at the end of the year, before returning in 2010 to once again win the series championship partnered with Pruett. Over the course of the year Rojas set another series record for most victories in a season with nine,