Glyn Schofield will ride French import Au Revoir in the Melbourne Cup and he has the Sydney stewards to thank.

Led by chief stipe Ray Murrihy, the stewards found themselves in the unlikely situation of going into bat for a jockey on Saturday after results at Flemington opened the door for Schofield to ride in the Cup.

Trouble was, the hoop had already taken eight mounts at Tuesday's Randwick program.

Once a jockey has accepted a race ride they are usually bound to it but the stewards had sympathy for Schofield's plight given a mount in Australia's most famous race was in the offing.

After negotiating with connections of his Randwick bookings, Murrihy confirmed Schofield had been cleared for the Melbourne Cup mount.

"It's unprecedented really to jump off eight rides but it is the Melbourne Cup," Murrihy said.

"But if any trainers or owners had sought to hold him we wouldn't have let him go."

Schofield's cause was aided by the availability of Brenton Avdulla whose two mounts at Flemington on Tuesday were scratched.

He will replace Schofield on all eight runners at Randwick.

"A lot of things had to fall into place for it to happen. I'm very happy," Schofield said.

"The Melbourne Cup is one of the best races in the world."

The Cup mount on Au Revoir became available after Hong Kong's Joao Moreira ditched that horse in favour of Signoff which earned a spot in Tuesday's field with his Lexus Stakes victory.

Trained by Frenchman Andre Fabre, Au Revoir is a dual Listed winner in France and finished third in the Moonee Valley Cup at his only Australian start.

A $41 chance for Tuesday's race, he will be out to better Schofield's best Cup result, a third aboard Mourilyan in 2009.