He turned out for the Tauranga under-15 team in Auckland before a dash back to the Mount. "It was on Friday night. I was asked to play right after my game up in Auckland.
"Our game was at 9.30am. I had to leave straight away to come down and play for these guys. Both days a lot of action came my way, so that was good."
There is every chance the young athlete's schedule will be similarly stacked in the coming years. The flyer has already had to turn his back on representative rugby with Bay of Plenty age-group teams and will soon switch to summer mode and scorching sub-12sec 100m times for Tauranga Ramblers and Waikato.
His personal best of 11.83sec is seriously quick and you get a sense talking to him that this may be just the beginning.
A day will likely come when Isaac will have to choose which sport he wants to pursue professionally, but if he has his way that day is still a long way of.
"I want to play every sport and just get out there."
As is often the case with such talents, Isaac's sporting pedigree runs deep. His father played rep footy, while numerous members of his family have represented New Zealand in softball.