The 39-year-old Robitaille had been playing despite the injury. But he felt persistent soreness in the leg, and an MRI revealed the fracture, the Kings said.
Robitaille has four goals and three assists this season.
The Kings also will be without defenseman Mike Weaver for their
two-game road trip beginning Wednesday night in Dallas. He has a foot injury.
On Tuesday, the Kings placed center Derek Armstrong, who has a groin injury, on the injured list and recalled defenseman Richard Petiot from Manchester of the AHL.
Kuba, an All-Star selection in 2004, has led the Wild in average
ice time in each of the club's first four seasons.
The Wild have traditionally rotated their captaincy each month,
rewarding a player who has shown the strongest leadership.
Defenseman Alex Henry was the man for October.