Usain Bolt is "not going to make it" as a footballer, because he has a "first touch like a trampoline", according to Perth Glory striker Andy Keogh.
The former Republic of Ireland international is currently enjoying his second spell at the Australian club, scoring 40 goals across 95 games.
Bolt, meanwhile, is attempting to transition from a world-class Olympian, who won eight gold medals, and is currently turning out for the Central Coast Mariners on a trial deal.
He recently scored his first two goals in a friendly, leading to claims that the Mariners are set to sign him permanently , but Keogh insists that he does not have the talent to play in the A-League.
"It's nice to have the attention on the A League but him playing in the A League, that's not for me," he told Off The Ball .
"He's 31. For me, he's not going to be able to make it [as a footballer].
"He's shown a bit [of potential] but it's a little bit of a kick in the teeth to the professionals that are in the league.
"It's fine from a marketing point of view but from a football perspective, it's a little bit farcical."
Bolt is a famous Manchester United fan, and has played at Old Trafford in the Soccer Aid charity match.
Keogh, though, cannot see why anyone would believe that the sprint king could add value to a football team.
"If there's someone who genuinely thinks he'd be a good football addition, I don't think they should be in a position to make those calls," he added.