Port Adelaide skipper Travis Boak signs a massive four-year contract extension

CAPTAIN Travis Boak is almost certain to finish his career as a Port Adelaide player after signing a massive four-year contract extension.

Travis Boak celebrates a captain's goal.

CAPTAIN Travis Boak is almost certain to finish his career as a Port Adelaide player after signing a massive four-year contract extension.

The mega multi-million dollar deal ties Boak to the club until the end of the 2018 season, meaning he is likely to be a one-club player.

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Boak, 25, already was contracted for next season.

His new deal means he will stay at the club for the next five years and comes just over a year after he was torn between staying at the Power or returning to Victoria to play for Geelong.

"I'm really enjoying it here and I feel really settled," Boak said of his new contract.

"This is a fantastic group to be part of and I'm looking forward to spending the next five years here."

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Boak has become one of the AFL's premier players, this year winning his first All-Australian selection.

He has played 131 games for the Power.

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His signature follows those of Jay Schulz, Hamish Hartlett, Jake Neade and Brad Ebert this week, giving the club plenty of on-field stability.

Coach Ken Hinkley described Boak as a natural leader.

"The people who play with him fall in behind him. Like a typical captain he gets them all going," Hinkley said.