Damien Oliver will miss the ride on Royal Descent in Saturday's Turnbull Stakes and a number of his other spring carnival mounts could be at risk after he failed in his appeal against a careless riding charge on Monday.

Oliver told the racing Appeals and Disciplinary (RAD) Board his riding had been affected by his involvement in an "intense and heated" protest hearing just before he caused interference during Friday night's JRA Cup at Moonee Valley.

Oliver pleaded guilty to causing interference on Mr Moet soon after the start of the 2040m race.

The former champion rider told the RAD Board the protest hearing had cut into his preparation time for the JRA Cup and had caused him emotional distress.

"I probably wasn't in my clearest state of mind," Oliver told the Board.

"I was dealing with emotions and the circumstances of the protest."

Despite having ridden seven winners in two weeks since he completed a 10-month ban Oliver said he hadn't had time "to get my eye in".

While Oliver had argued successfully against fellow rider Craig Williams at the protest hearing after the Stutt Stakes, he failed comprehensively on Monday to have the 10-meeting ban reduced.

In dismissing Oliver's appeal, RAD Board chairman Russell Lewis said Oliver had failed to look to his inside as he crossed toward the fence and caused interference.

Lewis said Oliver was "the master of the situation" and failed to take sufficient care and that the stewards had made all the appropriate discounts when assessing the penalty.

Oliver began his sentence on Saturday and will be able to ride in races again next Monday.