Jeffrey Brian Burton ( born June 29 , 1967 in South Boston , Virginia ) is a Nascar Sprint Cup series driver . Jeff Burton drives the # 31 Caterpillar Chevrolet Impala SS for Richard Childress Racing , and used to drive for Roush Racing in the # 99 car . Jeff Burton ( born June 29 , 1967 ) , also referred to as JB , is a NASCAR Sprint Cup Series driver who drives the # 31 Caterpillar Chevrolet Impala SS for Richard Childress Racing .