Three players will be tested ahead of Port Adelaide's final minor round match this Sunday in Perth.
Mitch Georgiades and Lachie Jones will be assessed later in the week and are expected to be available for selection, while Marshall will need to continue progressing successfully through concussion protocols.
Georgiades had been sidelined for two games with a quad strain, Marshall has missed one, and Jones was subbed out of Saturday's game with Achilles soreness.
Port Adelaide will name its extended squad for Sunday's game against Fremantle on Thursday at 5:50pm ACST, with a final team to be announced on Friday at 4:30pm.
Injury list
Lachie Jones (achilles) - test
Todd Marshall (concussion) - test
Mitch Georgiades (quad) - test
Trent McKenzie (quad) - season
Kyle Marshall (shoulder) - season
Jeremy Finlayson (spleen) - season
Sam Powell-Pepper (knee) - season
