During their school years the boys surfed competitively, racking up multiple wins and titles between them. Out of school Aaron moved onto the WQS and both Grahams earned sponsorship.
As Aaron began to shun the competitive circuit Kobi was becoming increasingly known for his fearless approach to the sport and his enthusiasm for monster swells. Kobi's fervor for big waves may stem from their trips to Hawaii, where at the tender age of 14 he and Aaron rode 10ft Pipe.
Other big wave spots Kobi has under his belt include Shipsterns, Ours and Pedra Branca. In 2008 he was recognized for his surfing bravado as an Oakley Big Wave Award nominee. The wave, Pedra Branca was 25 - 30 ft of thunder with Kobi as smooth as silk riding down the face.