A-League leaders Central Coast Mariners say goalkeeper Mat Ryan will no longer make a hotly-criticised trip to Scotland to trial with Rangers due to a minor shoulder injury.

The Mariners announced on Sunday that Ryan would miss this weekend's big clash with third-placed Melbourne Victory to spend 10 days training with the fallen Glasgow club.

Staying in Australia ... Mariners goalkeeper Mat Ryan. Credit:Getty Images

On Monday they released a statement saying Ryan's trip to Scotland had been "indefinitely postponed" due to a shoulder knock.

"While the injury is minor, both clubs have agreed that it is in Ryan's best interests to remain in Australia under the care of the Mariners' medical department for the foreseeable future," the club said in a statement.