West Coast youngster Chris Masten will undergo season-ending groin surgery on Monday after carrying the injury for much of the AFL season.

Masten, taken with pick No.3 in last year's national draft, made his debut against Adelaide in round two and has averaged 15 possessions a match in nine games this season.

But Masten, often restricted to light duties at training as the Eagles attempted to carefully manage his injury, has not been able to play since round 12.

It is not the first time a groin injury has troubled the 19-year-old.

Last year, Masten overcame the effects of osteitis pubis to play a starring role in the under-18 carnival.

West Coast doctor Rod Moore said the decision to send Masten in for surgery now had been made in consultation with club surgeons.

"After a mid-season surgical review it was decided that Chris needed a groin operation," Moore said.

"It was a choice between a period of rest or surgery and it was decided it would be in Chris' best long-term interests to have the surgery now."

Masten joins Matt Rosa (fractured ankle), Shannon Hurn (fractured leg), Mitch Brown (knee) and Beau Waters (elbow) as other players unlikely to feature again for the Eagles this season.

West Coast sit equal last on the table with just two wins to their name and face Richmond at Subiaco Oval on Sunday.

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