Richard J. Karth (born December 13, 1952) is an American professional historic motorsport and stock car racing driver.

90 formerly owned by Donlavey Racing in conjunction with the Midwestern Council of Sports Car Clubs.

Growing up a racing fan, he watched quarter midget events at the Shawano County, Wisconsin fairgrounds alongside his father and uncle who owned a funeral home that operated an ambulance for drivers.

[8] In August 2019, MBM Motorsports announced Karth would make his NASCAR Xfinity Series debut with the team in the CTECH Manufacturing 180 at Road America; with Karth at the age of 66, MBM stated their pride in being a "gateway for so many racers, young and old, to accomplish their goals.

61 Toyota Camry with Dick Trickle Memorial Project branding, he remained on the lead lap through the opening stage before being substituted for Timmy Hill for the rest of the race; Hill finished 30th, though Karth received the points as he started the race.