Green Bay Packers coach Mike McCarthy said Sunday that he planned to roll with Brett Hundley and Joe Callahan as his quarterbacks and he made it official Monday when Callahan was signed from the practice squad to the 53-man roster, a source said.

Hundley will take over the starting job from quarterback Aaron Rodgers, who suffered a broken right collarbone in the first quarter of the team’s 23-10 loss to the Minnesota Vikings at U.S. Bank Stadium.

Callahan, it appears, will be the backup.

It’s unclear if the Packers plan on putting Rodgers on injured reserve or keeping him on the 53-man roster with the hope that he could return later in the season. Though the Packers have said Rodgers’ injury could be season-ending, they have not revealed whether he will need surgery to repair the break.

If they don't put Rodgers on injured reserve, a roster spot will have to be created for Callahan.

The Packers are expected to work out some veteran quarterbacks, but it doesn’t appear they intend to add a third to the 53-man roster.

In Callahan, the Packers are adding someone who knows their system well but has not played a down of regular-season football. The record-setting quarterback from Wesley College was on the Packers’ 53-man roster for nine games last year but was active for only one.