Port Adelaide have delisted utility Nick Lower and ruckman Jon Giles, leaving the AFL club with four vacancies on their list for the 2010 season.

Lower played 20 games for the Power but always one of the first players to be dropped and never established a home in the side.

Giles' talent as a young ruckman has never fully developed, forcing Port to move on to other younger aspirants to take over from the retired Brendon Lade.

The retirements of Peter Burgoyne and Toby Thurstans also made room on the list, while one vacant spot has been taken by upgraded rookie Daniel Stewart.

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