He graduated in 2000 and ventured into sprint car racing , competing in a number of series across the midwestern United States .
After karting , Gregg began in cars in amateur SCCA Formula Atlantic in 1998 and 1999 while attending Miami University .
Gregg graduated in 2000 and ventured into sprint car racing , competing in a number of series across the midwestern United States .
After karting , Gregg began in cars in amateur SCCA Formula Atlantic in 1998 and 1999 while attending Miami University .