Jeff Janis, a seventh-round receiver from Saginaw Valley State who was picked two rounds after Abbrederis, also has signed his four-year deal.
That signing was listed on Wednesday's NFL transactions notice, although Abbrederis' was not, probably because the paperwork was not filed before the end of official league business.
The Packers have seven more draft picks to sign, but those are mostly formalities. Perhaps the only deal that could take more than a few days is that of first-round pick Ha Ha Clinton-Dix.
All of the draft picks are expected to participate in rookie orientation camp, which begins Friday. Those without signed contracts will be assured their full value even if they get injured this weekend.
In another move, the Packers waived cornerback James Nixon because he failed his physical. Nixon began last season on the practice squad but was added to the roster Oct. 7 and played in three games before he sustained a knee injury Nov. 17 that landed him on injured reserve. The injury, a torn meniscus, was not expected to prevent him from being ready for the start of this season. Nixon was one of the fastest players in training camp with the Packers last season, having run a 4.31 40-yard dash during his pro day last year.