The 100-metre world record-holder scored his first two goals in professional football on Friday when he started a pre-season game against second-tier Macarthur South West United in Sydney. "Seriously", the 100m and 200m world record holder added.
The Central Coast triallist has been offered a two-year contract by Maltese club Valletta FC according to a report by ESPN.
It has seemingly put the Mariners on the clock to give him a full-time professional contract despite January being flagged as the probable deadline for a final decision.
Discussing speculation that Bolt could first sign for the Mariners and then be sold on to the European club, Koch said on breakfast TV show "Sunrise": "So the Mariners sell him for money, they make a lot of money out of it?".
The definition of an athlete, roughly translated, is a person competing in a sport that has an anti-doping policy.
Usain Bolt has reportedly been offered a "two-year deal" from European club.
The eight-time Olympic sprint champion also has a number of personal sponsorships that could count against him.
He's now playing alongside on-loan Aston Villa forward Ross McCormack for the Gosford-based club, having spent time training with Borussia Dortmund earlier in the year.
Central Coast Mariners chief executive Shaun Mielekamp is unsure if the club will try to land Bolt on a permanent deal, saying last week: "We have genuinely treated Usain like we would have any other trialist".
However, his time in Australia may end up being cut short as agent Tony Rallis confirmed that there is a contract offer on the table for the former sprinter.