MELBOURNE, AUSTRALIA - MARCH 30: Jake Carlisle of the Saints celebrates a goal during the round two AFL match between the North Melbourne Kangaroos and the St Kilda Saints at Etihad Stadium on March 30, 2018 in Melbourne, Australia. (Photo by Michael Dodge/Getty Images)

St Kilda defender Jake Carlisle won't be offered a new deal by the Saints for the 2022 season, according to 7 News' Tom Browne.

Carlisle has battled ongoing back injuries across his tenure in the red, white and black, playing just 27 games across the past three seasons.

The 29-year-old joined the Saints ahead of the 2017 season after six seasons with Essendon, playing a total of 151 games across his stints with the two Victorian clubs.

Carlisle has been limited to just four games for the Saints this season, with his last appearance coming in Round 6 against Port Adelaide.

The key-defender was an integral part of the Saints' impressive 2020 campaign, featuring in the club's elimination final victory over the Western Bulldogs before departing the club's Queensland hub to return home for the birth of his child.

Carlisle could be of value to rival AFL clubs, with several sides looking to bolster their key-position stocks for next season.

Meanwhile, Fremantle's Reece Conca has reportedly notified teammates he won't be offered an extension past this season.

According to AFL.com's Nathan Schmook, the Dockers will part ways with the utility at season's end.

Conca has played 46 games with Fremantle since joining the club from Richmond at the end of the 2018 season.

The 29-year-old has played 10 games for the Dockers this season, with his latest match coming in Round 13.

Conca has played a total of 150 AFL matches after making his debut with the Tigers in the 2011 season.

The Perth product was awarded as Richmond's Best First-Year Player after his first season at Punt Road.