BRISBANE defender Marcus Adams will undergo arthroscopic knee surgery on Monday and be sidelined for up to eight weeks.
Adams, who was recruited from the Western Bulldogs during the off-season, came to the Lions with a knee injury and has not been able to play a game yet.
Lions football manager David Noble said Adams had been close to a return but an impingement in his knee was restricting him getting back to 100 percent.
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"He has completed 90 percent of his rehab program, predominantly straight-line work and the issue is when we have increased his agility work," Noble said.
"This operation should alleviate that, and we look forward to seeing him out on the field around the bye."
Adams is expected to miss between six and eight weeks.
The 25-year-old has struggled to get on the field since his 2016 debut, playing a total of 27 games.