Butters, Rozee and Duursma have signed two-year extensions that will see them through until the end of the 2022 season, while Garner’s two-year deal will see him remain at Alberton until at least the end of the 2021 campaign.
Patmore has signed a one-year deal to see him through to 2020.
“It is pleasing to have five outstanding young men commit their future to the Port Adelaide Football Club,” General Manager – Football, Chris Davies told the club’s website.
“In just their first or second years at the club, they have demonstrated incredible professionalism and a want to improve, in line with the development we expected when we drafted them.”
Rozee and Duursma have played every game this season, while Butters has played all but one.
Garner has three AFL games to his name, while Patmore is still awaiting his debut.