Crows wingman Paul Seedsman has suffered a suspected anterior cruciate ligament (ACL) injury in Adelaide's loss to Geelong on Thursday night.
Seedsman was stretchered from Adelaide Oval in the final quarter of the Round Three clash.
"Paul has sustained a forceful hyperextension injury to his left knee while landing from a contested mark," Crows Science and Medical Services Coordinator Steve Saunders said.
"He requires an MRI to determine the extent of the injury."