The 21-year-old Gibson hasn't played since giving up six goals in a season-opening loss at Pittsburgh. Frederik Andersen has since won three straight games for the Ducks, and Gibson wants to regain his sharpness in Norfolk before returning to Anaheim next week.
Maroon apparently injured his knee Monday in a collision with Buffalo's Josh Gorges. Allen hasn't played this season due to a lower-body injury.
The Ducks signed LaBarbera in the offseason. Wagner is the AHL's co-leader in goals this season.