Hawthorn and St Kilda have each made last-minute signings ahead of the AFL's deadline to add players as injury compensation.

The Saints have added ex-Magpie backman Jonathon Marsh to bolster their defensive stocks in the wake of injury setbacks to Jake Carlisle and Dylan Roberton.

“We’re really excited to add Jonathon to our playing list,” St Kilda football manager Simon Lethlean told the club website.

“Following two seasons with East Fremantle in the WAFL, Jonathon moved back to Melbourne with his partner late last year with the express purpose of reigniting his AFL career.

“He has been training with Richmond’s VFL team throughout the pre-season and looked impressive as part of the Tigers’ senior intra-club game a few weeks ago.

“With the recent injuries to Jake Carlisle and Oscar Clavarino, Jonathon adds to our depth and importantly is someone we think is ready to play if required.”

Meanwhile, the Hawks have recruited 200cm ruckman Ned Reeves with the club needing to fill out their list after Will Langford's surprise retirement.

Clubs have until 5pm on Friday to finalise their lists under the new pre-season supplemental selection period.