Stefan Martin limps into wounded Lions' den Injured Stefan Martin, left, with embattled Lions coach Michael Voss. BRISBANE has been rocked by another serious injury, with ruckman Stefan Martin set to miss six weeks with an ankle problem. The 26-year-old had already been ruled out of today's must-win clash with his former club Melbourne. But Lions medical staff yesterday confirmed Martin will go under the knife this week. Martin was making a decent fist of the forward/back-up ruck role at the Lions but the ankle injury had hampered his movement in the past couple of weeks and it had showed no signs of improvement. Billy Longer has been called up for today's Gabba clash, after being an emergency for last week's game against North Melbourne. Martin's injury news comes days after star midfielder Daniel Rich suffered a broken shoulder blade in a training mishap, which will rule him out for eight weeks. Fellow midfielders Claye Beams (knee, season) and Jared Polec (ankle, 4-6 weeks) are also in the expanding casualty ward. Matt Maguire will miss today's match with a leg injury but is expected back soon, while Simon Black and Brent Staker are also on the comeback trail from knee injuries. Brisbane midfielder and former Demon Brent Moloney, who will celebrate his 150th AFL game, expects Melbourne to come out firing after a club-record 12-goal final quarter to set up their first win of the season against GWS last week. "They'll come up here quietly confident of having a real crack," Moloney said. They finished off the game really well last week so we have to be ready to go from the start.