Brisbane Roar are searching for a replacement goalkeeper barely a month out from their A-League title defence after number one gloveman Michael Theo was ruled out for at least eight weeks.

Still reeling from their 2-0 FFA Cup loss to Adelaide United on Tuesday night, the Roar received more bad news when scans revealed Theo had suffered a fractured wrist.

Theo, 33, missed the FFA Cup match after suffering the injury while pulling off a save at a Monday training session.

Roar coach Mike Mulvey said Theo's injury would require surgery.

It is not ideal news ahead of defending champion Brisbane's A-League season-opening clash with Adelaide United on October 12.

Jamie Young - the only other keeper on the Roar's books - filled in for five-time championship winner Theo in the FFA Cup match.

The Roar have reportedly approached ex-Australian youth international Michael Turnbull regarding a short term deal.

"Michael sustained a wrist fracture during shooting practice at training on Monday," Mulvey said.

"He made an unbelievable save from a snap shot during one of our normal drills.

"Unfortunately, he sustained the injury which will see him out of action for the beginning of the season."

AAP