To make room, they put receiver Myles White on injured reserve with an undisclosed injury. The team made no mention of White being injured after the game or on Monday, and no injury was provided in the announcement.
Tretter, who suffered a broken fibula and ligament damage in his ankle on the first day of organized team activities, has practiced for the last three weeks. The Packers had to decide by Tuesday whether to put him on season-ending injured reserve or add him to the roster.
It's hard to imagine Tretter can contribute this season but, by activating him, he at least can practice with the team for the rest of the season. Tretter, the second of the team's three fourth-round draft picks, did not have the benefit of training camp and had just one padded practice in his three weeks.
"It's nice to see him in pads," offensive line coach James Campen said on Thursday. "I haven't seen him in pads since watching him on tape (at Cornell)."
White, an undrafted rookie who opened the season on the practice squad, caught nine passes for 66 yards. The Packers have just four receivers on the roster: Jordy Nelson, James Jones, Jarrett Boykin and Chris Harper, a fourth-round pick by Seattle who the Packers claimed off waivers at midseason from San Francisco. He's been on the active roster for just two games — his first two on the squad — and has been inactive the last six weeks.
Star receiver Randall Cobb, who is on injured reserve-designated for return, was eligible to practice last week but was not cleared by the medical staff. He's been out since sustaining a broken fibula against Baltimore on Oct. 13. He is eligible to play this week.
"He had a good workout (on Monday)," coach Mike McCarthy said on Monday. "He'll go again (Tuesday). But he has not been medically clear but he's progressing. He's doing a lot more this week than he did last week."
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Bill Huber is publisher of Packer Report magazine and PackerReport.com and has written for Packer Report since 1997. E-mail him at firstname.lastname@example.org, or leave him a question in Packer Report's subscribers-only Packers Pro Club forum. Find Bill on Twitter at twitter.com/PackerReport.