Bolt officially started his trial with the Mariners on Tuesday, completing a short training session under the watchful eye of Mulvey.

The Jamaican sprint superstar is expected to play his first game on August 31.

The club is refusing to put a timeline on how long they will give Bolt to prove his worth before deciding whether to offer a contract or not, with Mulvey declaring it could take up to 12 months.

Mulvey suggested Bolt's presence will be a boon for his club and the local community but also the Mariners' youngsters.

"This guy is a winner," he said at Tuesday's press conference.

"Eight gold medals in the Olympics. You don't just do that by having great ability. You do it by having great mental capacity.

"If we can pass on a little bit of that to my players, who are coming from the cellar and trying to get to the top, this could be great.

"You don't lower your training standards when Usain Bolt walks in the door."

Mulvey used the example of young players Jordan Murray, Josh MacDonald and Matt Millar, who all earned contracts with the club on the back of strong form in the NSW National Premier League.

"They're thinking how much can I learn from this guy? How much can he take me on my journey?" Mulvey said.

Central Coast striker Matt Simon and off-season recruit Kalifa Cisse both noted Bolt has already fit in well.

"He's got a passion to become a footballer. A lot of players know what that's about and we're really looking forward to seeing what he can do," Simon told reporters.

Bolt, who has repeatedly declared he wants no special treatment from the Mariners, made it clear he wants to become mates with all of his potential teammates.

"I've always said one of my all-time best moments is running the 4x100 ... to come into a team is wonderful," he said.

"There's going to be a lot of banter. A lot of fun.

"I'm learning the (team's) rules right now, because there's a lot of fines."

Australian Associated Press