OLLIE Lord will undergo an arthroscopy to determine the extent of his knee injury, after an incident during training on Saturday.
Lord landed heavily in a marking contest, with scans showing bone bruising in his knee and an impaction fracture to the tibia.
The 22-year-old will miss the first part of the season, with a timeline for return to become clearer following the procedure.
Zak Butters (ankle), Quinton Narkle (back), Dante Visentini (concussion) and Lachlan Charleson (ankle) have all rejoined full training and have been removed from the injury list.
An extended squad for Sunday's Round 1 clash against West Coast will be named on Thursday at 5:50pm ACDT, with the final team to be announced on Friday at 4:30pmACDT.
Port Adelaide's SANFL side will play its first trial game on Saturday from 3:20pm at Thebarton Oval.
Injury list
Ollie Lord (knee/tibia) - timeline TBC
Kyle Marshall (back) - test
Tom McCallum (ankle) - 4-5 weeks
Hugh Jackson (hip) - 13-15 weeks
