David Booth, who has yet to take part in training camp, will be out four to six weeks with a groin strain.
Canucks coach Alain Vigneault revealed the extent of the injury Tuesday, a day after Booth underwent an MRI. His absence leaves two holes on Vancouver's second line because center Ryan Kesler is recuperating from offseason shoulder and wrist surgery and remains out indefinitely.
Mason Raymond, who missed much of last season while recovering from a serious back injury, is the only holdover from the second line able to participate in camp.
Journeyman forward Andrew Ebbett and Jordan Schroeder, the club's top draft pick (22nd overall) in 2009, are auditioning to fill Kesler's spot, while second-year pro Zack Kassian has been playing the other wing alongside Raymond.