While a skilled racing driver, Mulholland was more infamously known as Bruce McPhee"s "contractual obligation" co-driver. In endurance production touring cars McPhee raced in during the 1960s which required two drivers, Mulholland would drive one lap at approximate mid-distance before handing the car back to McPhee.
Mulholland holds the record for fewest completed laps to win a Bathurst 500 when he co-drove with McPhee to win the 1968 Bathurst 500. (Current rules limit driving to 3 hours, 30 minutes of consecutive driving, and a maximum distance a driver may run, and since 1987, a driver must complete between 52-109 laps each, with no driver completing more than two-thirds distance, 109 laps currently, of the race) Mulholland later owned the car that won the race in 1968, and died aged 65.
