Sharman kicked four goals in St Kilda's 58-point win over Fremantle at Blundstone Arena in Tasmania.

It was the best of his five AFL appearances to date, amassing 15 disposals, six marks and earning high praise for a commanding performance.

Some of that high praise came from his St Kilda captain Jack Steele after the game.

"We obviously got him in the mid-season bye, he played pretty quickly and hasn't had a bad game since," Steele told Fox Footy after the game.

"He's always popped up and kicked a couple, which is nice."

Sharman finishes his first AFL season with 10 goals from five official AFL games, but he never got on the field as the sub in his debut.

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His four-goal performance to finish the season came just a couple of days after the Saints rewarded him with a two-year contract extension.

St Kilda head of list management James Gallagher was happy to lock Sharman in after picking him up in the mid-season draft.

"From a very limited preparation, Cooper has made a great start to his AFL career," Gallagher told the Saints' website.

"He's a really humble kid who has an excellent football brain, so we're very happy to extend his contract at St Kilda."

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