Sam Jacobs will miss at least four to six weeks after undergoing successful surgery on his knee.
Jacobs has been bothered by problems with his meniscus in his knee after a collision injury in round two against Sydney.
He has not played since, with the Crows opting yesterday to have him go under the knife.
“Given the complex nature of Sam’s meniscal pathology, a period of time and conservative management was first required,” Adelaide science and medical services coordinator Steve Saunders said.
“It became clearer this week, with persisting meniscal signs under graduated load progressions, that surgical intervention would serve him best in both the short and long-term.
“We expect Sam to progress quickly through the next 4-6 weeks of rehab and be back to his best."