The SCCA was busy changing the format of its Can-Am weekends, race after race. At Road America, Elkhart Lake, WI, the organizers ran two races, each with their own prize money. The first was a qualifying race called the "Can-Am Sprint". Of course, Mark Donohue's domination of the 1973 Can-Am season continued despite the revised format. He lapped Road America 3 seconds faster than any other competitor, and in the process became the first driver to break the 2-minute mark around the undulating circuit.
The second race, named the "Can-Am Cup", was the only one to award Championship points. Jody Scheckter attacked during the Sprint by jumping the start and leading through the first couple corners; Donohue, of course, swarmed all over the back of Scheckter's 917/10 and got past, leading by 3 seconds at the end of the first lap! The American wasn't about to let that happen in the Cup and cruised to a half-minute victory over the Porsche-dominated field.
Donohue on his way to a decisive victory at Road America, Elkhart Lake, Wisconsin.