Sydney recruit Paddy McCartin has been subbed out of his side's ANZAC Day clash with Hawthorn in what is the latest concerning blow for the ex-Saint.

McCartin is understood to have suffered a concussion during the match, having been involved in two separate incidents that hampered the tall forward.

McCartin - who suffered numerous head knocks in his 37-game stint at St Kilda - had his day end early after suffering a second high hit in the third quarter of the match in Launceston.

A total of eight concussions kept the 26-year-old sidelined for a majority of his time at Moorabbin, initially sparking fears his promising AFL career would cease after being delisted in 2019.

The Tasmanian-born key forward was recruited to Sydney ahead of the 2022 season as a Supplemental Selection Period signing and has since been utilised in defence, rekindling his career as an intercepting backman.

McCartin's lifeline with the Swans has begun as a fruitful one, with the Sydney tall ranking fourth in the league for intercept marks prior to Round 6.

Veteran Josh Kennedy was brought into the game as the medical sub, with McCartin now set for a 12-day stint on the sidelines under the AFL's health and safety protocols.

Post-game Swans coach John Longmire said that McCartin was feeling fine, with the club taking an "ultra conservative" approach in their decision making.

“No, he’s fine, the docs are ultra conservative with him, as you’d understand,” Longmire said.

“He’s feeling really good. He wanted to come back on. But we weren’t going to put him on afterwards, even though he felt good and said he was fine.”

The Swans will face Brisbane next week without McCartin, with the defender hopefully returning in Round 8 against the Suns.