Fremantle captain Nat Fyfe has undergone season-ending surgery, taking to social media to share a post-operation selfie while declaring he will be “right behind” his teammates for the rest of the season.

Fyfe dislocated his shoulder against the Western Bulldogs last month and has attempted to fight through the pain since.

But a second dislocation against Sydney on Sunday forced Fremantle to act and end his season a month early.

Fyfe reached for a loose ball as Swans youngster Sam Wicks attempted a soccer off the ground.

The contact saw the two-time Brownlow medallist immediately clutch at his shoulder in pain before he was subbed out of the game shortly after.

Fyfe remained on the east coast while his teammates returned to Perth on Sunday night, before undergoing reconstructive surgery in Melbourne.

“Hey Freo fam, shoulder op went well and I’m resting up ready for next season,” Fyfe wrote.

“Disappointed I can’t finish the year with my team but relieved I can start healing.

“Will be right behind the boys for the rest of the year!

“Thanks for the well wishes and appologies (sic) for the rough post op selfie.”

Fremantle executive general manager of football Peter Bell said Fyfe will remain in Melbourne to recover.

“Nat’s pulled up well and the surgeon is reporting that everything went to plan,” Bell said.

“It was the same surgeon who had operated previously on Nathan and he’s spending a few days recovering in Melbourne currently.”

Key defender Alex Pearce has been ruled out of Fremantle’s clash against Richmond with concussion.

While veteran Michael Walters is facing an uphill battle to return before the end of the season after injuring his hamstring against the Swans.

“It’s disappointing for Michael, he sustained a hamstring injury during the game against Sydney and at this stage it looks like a four to six week injury,” Bell said.

“Alex is going really well. We’re hoping that he’ll be able to do some running tomorrow (on Wednesday) but he’ll miss this week’s fixture.”

Veteran Stephen Hill’s season is also in doubt after he suffered yet another hamstring injury in his return to Peel Thunder’s WAFL league side on Saturday.

“Stephen sustained a hamstring injury in the match for Peel on the weekend. It looks like a three to four week hamstring,” Bell said.

While forward Josh Treacy is expected to return after he was a late withdrawal against the Swans with illness.

“Josh is having a run this afternoon. He came down with a bit of illness overnight (on Saturday) and was a late withdrawal for the game but he should be fine this week,” Bell said.

Injury list: Round 20Alex Pearce (concussion) – 1 weekSam Switkowski (hamstring) – 2 weeksRory Lobb (ankle) – 2-3 weeksStephen Hill (hamstring) - 3-4 weeksMichael Frederick (ankle) – 4 weeksMichael Walters (hamstring) – 4-6 weeksNat Fyfe (shoulder) – SeasonSam Sturt (knee) – SeasonHeath Chapman (shoulder) – SeasonBrennan Cox (hamstring) – SeasonJoel Hamling (ankle) - Season