August said afterwards, "It wasn't my night. Chris was awesome and I was disappointed with myself and my effort." He said there would be no rematch.
"Win or lose I'm hanging up my gloves after my next fight."
A self-employed fire system installer, August was referring to his November 7 bout in his home city of Adelaide against Aucklander Zac Fatamaka for the IKBF under-85kg title.
Before Saturday night's fight, the Bay's best for at least 29 years, August had won 41 of his 55 fights, 35 by knockout.
Former Wairoa kickboxer Jamie "VDK" Van Der Kuijl's pro MMA debut lasted 51 seconds. He was knocked out by Waikato's Matt "The Viper" Vaile in the first round of a bout set for three five-minute rounds.
In the other main card fight, and the only female fight on the night, Aucklander Daria "The Boss" Smith scored a unanimous points win against Wellingtonian Genitane "AAA" Lupi in their five two-minute-round kickboxing clash. It was sweet revenge for Smith who had lost to Lupi, a mother of three and actor-stuntwoman, when they met in a comp last year.
Several of the Bay's promising fighters featured in undercard bouts. Kelvyn Jones of Hawke's Bay Combined Martial Arts proved his build-up to the November World Kickboxing and Karate Association Unified World Championships in Spain is on track with an RSC win against Bryce Gambirazzi of Hawke's Bay Orphans after Gambirazzi collected a cut to the eye.