If so, no one told Mariners coach Mike Mulvey, who, speaking after his side's 1-1 draw with the Brisbane Roar, not only denied any knowledge of a contract offer, but wondered if Bolt could fit into the team.
"It's news to me," he told Fox Sports after the game last night.
"You have a look at our front line today and you wonder whether he could get into any of those positions, wouldn't you?" Mulvey said. "I do appreciate how important this story is for the rest of the world.
"You're just talking about speculation, I don't know anything about what you're talking about and that's the honest truth."
Bolt, who retired from track and field last year, was in Melbourne during the Mariners' opening match, with News Corp. Australia earlier saying he was considering his options after being offered a contract.
He has been training with the Mariners for several months, and scored two goals in a trial match two weeks ago in his first start.
Mulvey, who said several weeks ago that it might take until January to determine if Bolt can make it in professional soccer, added that the former sprinter was not on his radar for now.