PORT ADELAIDE defender Martin Frederick has agreed a contract extension to remain at the club until the end of 2021.

The 20-year-old is yet to debut at AFL level but has featured 20 times for the club at SANFL level since being picked up as a Category B rookie at the end of the 2018 season.

The Portland Football Club product was part of the Port Adelaide Next Generation Academy and has become known for his speed and rebound out of defence.

“It’s pleasing for our club to be able to retain Marty as a Category B rookie,” said General Manager – Football, Chris Davies.

“He was part of that unfortunate group which did not get to play regularly this year because of the restrictions surrounding our SANFL program. However, his attitude and application could not be questioned.

“We look forward to his continued development next season.”

The club can also confirm midfielder/forward Jake Patmore has not been offered a new contract.

Patmore arrived at Alberton with pick 58 in the 2017 draft from Claremont in the WAFL.

He leaves the club having booted 16 goals in 18 SANFL games in the 2018 season.

The 21-year-old missed the entirety of the 2019 campaign after rupturing his anterior cruciate ligament, working back to full fitness this year.

“Jake is a real victim of circumstance; with an ACL injury in 2019 being compounded by a lack of regular competitive football in 2020 due to COVID, and what will be a reduction in list sizes for 2021.

“He is an outstanding young man who has demonstrated great professionalism, but we have had to make this difficult call based on our list numbers for 2021.

“He will always be welcome at Alberton and we wish him well for the future.”