Sharks centre Jesse Ramien will be sidelined for a month after scans confirmed a Grade 2 medial collateral ligament injury.
Ramien injured his knee in the second half of the Easter Sunday victory over the Warriors, limping off the Ocean Protect Stadium field in the 59th minute.
Mawene Hiroti will replace him in Saturday's clash with the Roosters in Perth.
Young outside back Michael Gabrael is also set to spend time with the rehab group after suffering a similar knee issue playing for the Newtown Jets last week.
Gabrael is awaiting test results to determine his return-to-play timeframe.
Front-rower Braden Uele is another on the injury list, ruled out of action this weekend after sustaining a concussion while playing in the NSW Cup.
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