The Cubs placed Zagunis on the restricted list Thursday after he informed the club that he will opt out of the 2020 season, Mark Feinsand of MLB.com reports.
Zagunis will be a part of the Cubs' 60-man player pool this season.
The Cubs sent Zagunis outright to Triple-A Iowa on Sunday after he went unclaimed off waivers.
Zagunis was designated for assignment by the Cubs on Saturday, Mark Gonzales of the Chicago Tribune reports.
Zagunis was optioned to Triple-A Iowa on Tuesday.
Zagunis is up as the Cubs' 26th man for Sunday's Little League Classic against the Pirates, Jordan Bastian of MLB.com reports.
Zagunis was optioned to Triple-A Iowa on Saturday, Jordan Bastian of MLB.com reports.
Zagunis remains out of the lineup for Thursday's game againt the Phillies.
Zagunis is starting in right field and batting ninth in Sunday's game against the Diamondbacks.
Zagunis remains out of the lineup for Saturday's game against the Diamondbacks.