Tim Fox, the leader of a 50- strong syndicate which owns Jawaal, claimed the lightweight jockey had not been fit to ride him in the Golden Mile, one of the season's most valuable handicaps. Quinn was injured in a fall at the track on Wednesday.
Fox was also scathing about the racecourse doctor, Mick Milligan, who gave Quinn medical clearance minutes before the race. Fox had watched Quinn hobbling painfully down the weighing room steps and wanted to replace him with Neil Varley.
Bookies were saved a huge pay-out when Jawaal, 2-1 favourite in the 19-runner field, was beaten into third place. Some of Jawaal's owners backed him at 33-1 weeks ago.
The controversy was fuelled by the fact that just over an hour after Quinn rode in the Golden Mile, the doctor stood him down on the grounds that he was unfit.
'Quinn was a greedy so- and-so. He should never have ridden the horse. He can't have given it full justice,' Fox said. 'Basically he's lied to us and it could have cost us the only chance we will ever have of winning a pounds 50,000 prize.
'I am absolutely staggered that the doctor allowed him to ride, and you have to say the decision could have cost us victory. I was a fool. I should have reported him to the stewards when I saw him hobble out and grab hold of the rail. But there was only minutes to go and I didn't want to create a fuss. The horse took a nasty bump into the straight which might not have happened if the jockey had been 100 per cent,' Fox added.
Quinn, who hopes to ride at Goodwood today after undergoing more physiotherapy, responded angrily to the criticism, expressing amazement that connections could say Jawaal had come in lame and yet argue that he should not have ridden the horse.
'I was hobbling, but jump jockeys do that all the time and that doesn't mean I wasn't 100 per cent. I don't think I could have given the horse a better ride, this is just sour grapes on their part.'
A Goodwood racecourse statement said: 'On arrival at the course, Jimmy Quinn was subjected to a thorough and vigorous medical examination. After consultation with the physiotherapist who had treated Quinn earlier in the day, the senior racecourse doctor, Mick Milligan, supported by a second medical opinion, cleared Quinn fit to ride.
'After the Schweppes Golden Mile, Quinn rode in the Kinrara Stakes. However, he aggravated his injury by banging his leg on the side of the starting stalls and as a result he was deemed unfit to ride for the rest of Thursday and Friday.'Reuse content