Port Adelaide ruckman Paddy Ryder is set to head back to Victoria at season's end, and will likely play for either St Kilda or Essendon next season.

According to the Herald Sun, Ryder will leave Alberton after five years with the Power, with Port Adelaide looking to go in a younger direction, and Ryder looking to continue his career.

The 31-year-old will need to choose between the Saints and the Bombers, with both clubs set to vie for his services.

The Saints are arguably in the box seat, as they're able to offer Ryder more money.

Ryder hasn't ruled out a return to Essendon, after playing his first nine seasons with the club.

The ruck/forward will be asking for at least a two-year deal from his new club, with the Power only interested in re-signing Ryder on a one-year extension.

This isn't the first time this season the Saints and Bombers have been after the same player, with Essendon ruckman Sam Draper the subject of some interest from St Kilda earlier this season.

Draper eventually decided to stay at Tullamarine.

Ryder would need to be traded away from the Power, although given his age and experience, he'll likely be moved for a late pick.