Poole Pirates say they are not expecting star rider Darcy Ward to race again for them this season.
The 22-year-old Australian has not been able to race since being provisionally banned from speedway last month by the sport's governing body.
Club captain Ward had failed an alcohol breath test at the Latvian Grand Prix.
"I can't see him riding anymore unfortunately, that's just the way it is," Pirates team manager Neil Middleditch told BBC Radio Solent.
"Unless something dramatic changes over the next few days, which would be nice, but is very unlikely."
In December 2012, Ward was arrested after being caught fleeing police while on drink and drugs.
Two months earlier, he was treated in hospital for a head injury after an attack outside a Dorset pub.
The sport's governing body, the FIM, has yet to pass final judgement on the case, but the Pirates are not hopeful of Ward being available for the Elite League play-offs.
"It's wishful thinking to hope he'll be there, maybe the powers that be might show some leniency, but I doubt it," Middleditch added.