McKenzie hasn't played at AFL level since round 13, 2022 and only managed two VFL appearances this year due to persistent calf strains that led to a recent trip to see world-renowned soft tissue specialist Dr Hans-Wilhelm Muller-Wohlfahrt in Germany.
McKenzie has been completing the off-season program at RSEA Park since returning to Melbourne and is expected to begin a modified pre-season program when the club's first-to-fourth-year players return to training later this month.
St Kilda is understood to be open to selecting McKenzie during the pre-season supplemental selection period, but need to see the Caulfield Grammar product prove his fitness across a block of the pre-season before re-signing him for 2024.