Fremantle ruckman Rory Lobb is set for an extended stint on the sidelines with a foot injury.

Scans revealed that the big man sustained a stress fracture during his side's win over Collingwood last week in a major blow for the Dockers.

The 26-year old was enjoying an instrumental 2019 after crossing from GWS in the off-season, averaging higher disposal, hit-out, clearance and contested possession numbers than in his time at the Giants.

Football manager Peter Bell said the club was behind Lobb in his road to recovery.

โ€œThe club is extremely disappointed for Rory,โ€ Bell told the club website.

โ€œSince returning to Fremantle, Rory has impressed everyone with his application and talent.

โ€œRory had been in excellent form in the ruck and in the past two weeks has produced outstanding games competing against Stefan Martin and Brodie Grundy.

โ€œThe club will support Rory through this challenge and we know that Rory will rehabilitate his injury with the utmost professionalism.

โ€œGiven the recent lower leg and foot injuries to key talls, an assessment of training and medical assessment protocols will be conducted to ensure we are operating at best practice. โ€œ

No timeframe has been put on when Lobb will return.