Benny's Buttons beat only one horse home at his last start but jockey Michael Cahill has dismissed it as a guide to his Eye Liner Stakes chances.

Cahill defended the effort of Benny's Buttons when he ran 14th in the Chief De Beers Quality (1110m) at Doomben on May 25.

"He drew a bad gate that day and he was never on the track at any stage of the race," Cahill said.

"I'd be putting the pen through the run and wouldn't be taking much notice of it."

The Kelso Wood-trained gelding was also ridden by Cahill when he won at Eagle Farm on May 11.

He believes that victory is a more reliable form reference.

"Even though he was first-up that day from a long spell he felt really good and finished the race off strongly," he said.

"He's definitely capable of being competitive in the Eye Liner and the wet track is another factor in his favour whereas a few of the others mightn't be as well suited."

The likelihood of a slow track at Ipswich on Saturday is just what Kelly Schweida wants for Doubtful Jack, who is striving to win his first race since October 2011.

"He's got form around Black Caviar, even though it's a while ago, but at his best he'd be right in a race like this," he said.

"No doubt his chances are better in the wet and his last run at Caloundra was quite good considering he hadn't raced for nearly two months."

Schweida said Doubtful Jack has been troubled by minor back ailments in the past 12 months which had affected the gelding's confidence.