Heinola, who has an ankle infection, underwent surgery, Scott Billeck of the Winnipeg Sun reports Thursday.
Heinola previously underwent ankle surgery last year and his infection is related to a screw from that operation, based on a report from Mike McIntyre of the Winnipeg Free Press last Friday. There's no timetable for Heinola's return, but McIntyre believes he'll be out for at least another month. The 23-year-old defenseman was originally in the mix for a spot on the Jets' Opening Night roster, but he might instead spend some time in the minors after he recovers.