his career was affected by arrests and convictions for driving while intoxicated. harrington is also one of the few american drivers to compete in the "big three" of american motorsports - the indy 500, the 24 hours of daytona, and the 12 hours of sebring. harrington also competed in the svra celebrity pro-am in 2014, 2015, 2016, 2017 and 2018. he finished 9th of the 33 starters in 2015 and in 2018 was on the podium with a second place finish in ap. harrington is one of the original instructors at the mid-ohio school, a position he still holds today.