GEELONG will be without speedy small forward Lincoln McCarthy again this week after he strained his hip flexor at training on Saturday.

McCarthy, who missed the game against Adelaide with a rolled ankle, was doing some goalkicking when he suffered the injury.

Cats' physiotherapist Mark Young told the club website the 22-year-old will not be out for an extended period.

"It's a low-grade strain. We don't think it will take him long," Young said.

"But he's a short-term rehab at this point."

McCarthy has kicked seven goals this season, returning from a foot injury that kept him out of football in 2015.

Key defender Jake Kolodjashnij had a plate inserted in his hand after fracturing it while tackling at training last week.

The surgery was successful and he is not expected to be out for more than a couple of weeks.

Youngster Nakia Cockatoo had a lateral ligament pinned down and repaired in surgery last week after being injured against West Coast.

He is expected to be out for up to two months.

The Cats will wait and see how Tom Lonergan pulls up after being taken out of the game against Adelaide early with concussion.