1973 Canadian Grand Prix

As of the conclusion of the 2024 Formula One World Championship[update], this is the last Grand Prix to be won by a driver born in the USA.

Wietzes stayed in front of Howden Ganley's Iso-Marlboro by mistake, which allowed several drivers, including eventual winner Peter Revson, to gain a lap on the field.

Chapman even went as far as to perform his traditional victory celebration of tossing his cap in the air at the end of what he believed to be the 80th lap, even though Fittipaldi was not shown the checkered flag.

After a long pause, the starter waved the flag over a group of cars consisting of Ganley, Mike Hailwood, Peter Revson and James Hunt.

[8] The officials then announced Revson as the winner after a long confusion which included protests from Ganley's then girlfriend (later wife) who had been keeping the team's lap chart.