Queensland trainers Tony and Maddysen Sears will turn to Jason Collett to ride Yellow Brick in the group 1 Epsom Handicap on Saturday at Randwick if regular jockey Andrew Mallyon is unable to recover in time from a fall.

Mallyon was named to ride the Stradbroke Handicap runner-up on Tuesday in the $1.5 million mile but fell from Miss Chamonix early in race four at Grafton that day. He injured his right elbow and it was unclear on Thursday if he would be fit to take the Yellow Brick ride, which was his only one on the day.

Jockey Jason Collett.

Jockey Jason Collett.Credit: Getty Images

Tony Sears was told Mallyon had been cleared of any breaks, but the jockey had a hematoma and was seeing a doctor on Thursday. He said Collett, who took Yellow Brick to third in the $2 million Five Diamonds at Rosehill last November, was on standby.

“We trust that he’s not going to ride the horse unless he’s 100 per cent,” Sears said of Mallyon.

Sears’ daughter, Maddysen, knows Yellow Brick better than anyone and has warned to write him off at your peril in the Epsom.

Yellow Brick was a $46 (Sportsbet) chance after coming fourth in the Show County Quality (1200m) and seventh in the Bill Ritchie Handicap (1400m) at Randwick, since his huge run to finish three-quarters behind War Machine in the group 1 Stradbroke.

Yellow Brick and Jason Collett, left, finish third to Pericles and Freedom Rally in the Five Diamonds.

Yellow Brick and Jason Collett, left, finish third to Pericles and Freedom Rally in the Five Diamonds.Credit: Getty Images

Maddysen has been with Yellow Brick for his Sydney campaign, riding him regularly in the track work. She was happy with the draw in 11 of 14 for the six-year-old and was backing him for a top-three finish.

“I think he was the forgotten horse in the Stradbroke and he’s probably going to be overlooked again,” Maddysen Sears said.