Lawson Aschenbach

William Lawson Aschenbach (born November 22, 1983) is an American professional racing driver. He is a four-time Pirelli World Challenge champion, and most recently, the 2014 Pirelli World Challenge GTS Champion. He is the 2006 SPEED World Challenge Rookie of the Year and became the first person to win the SPEED GT Championship in his rookie season. He is also the champion of the 2010 Grand-Am Continental Tire Sports Car Challenge ST Championship and 2014 Lamborghini Super Trofeo ProAM World Champion. Aschenbach first raced professionally in 2005. He currently races for Stevenson Motorsports in the IMSA Continental Tire Sports Car Challenge.