Saturday 18th March 1972

Bobby Unser led most of the way to win the 150 mile USAC Championship race at Phoenix International Raceway. Unser pulled away from Mario Andretti following a restart with 3 laps to go, crossing the line 4 seconds ahead of Andretti’s Parnelli Jones Colt-Offy. In qualifying, Unser’s new Eagle-Offy shattered the lap record with a speed of 141.966 mph, seven mph above the previous mark.