Doug Shierson Racing

Shierson was instrumental in the development of the Formula Atlantic series in the late 1970s, winning the championship with Howdy Holmes in 1978 and Jacques Villeneuve the Elder in 1980 and 1981.

Danny Sullivan replaced Holmes in 1984 and brought the team its first three CART wins at Cleveland, the Pocono 500, and Sanair on his way to 4th place in points.

He effectively lost the championship in the waning laps of the final race of the season (Tamiami Park), when his father Al Unser Sr. finished just high enough to clinch enough points to mathematically secure the title.

At year's end Unser elected to return to Galles Racing who had the new Chevrolet-Ilmor engine which would go on to dominate Indy cars over the next several seasons.

[4] Midway through the 1990 season, Shierson sold 50% of the stake in the team to businessman Bob Tezak, owner of International Games (makers of UNO).

[5][6] Longtime sponsor Domino's Pizza was facing legal issues stemming from their "30 minutes or it's free" delivery guarantee.

During the history of the team sponsorship, the Shierson entries traditionally carried the number 30, as a gesture to the "30-minutes or free" delivery policy.

Such an instance caused a fatal traffic accident, and company officials deemed sponsoring a race car inappropriate given the circumstances.

Facing sponsorship uncertainty, and deciding that he had accomplished his goals in the sport, Shierson eventually sold the entire team outright to Tezak in January 1991.

The car's livery was changed to the classic day-glow orange utilized by Granatelli entries over the years, and Luyendyk's services were retained for 1991.

In early August, Granatelli battled a restraining order from Tezak and Total Petroleum, which prevented them from taking to the track at the Michigan 500 for practice and qualifying.