The hard-hitting Bigby emerged as the starter at strong safety in training camp last season. He started every game, and had a team-high five interceptions and 13 passes defensed in the regular season. He was third on the team with 121 tackles.
Humphrey might be down to his last strike to overcome an injury history that includes a season-ending broken ankle suffered on the first day of training camp last year. He also sustained a hamstring injury that shortened his season in 2006.
Kuhn made his mark as a lead blocker down the stretch of the season, setting up an offseason battle with Korey Hall for the starting job.
If Bigby, Humphrey and Kuhn, each of whom completed their second accrued season in the NFL, were not tendered contracts by the Packers, they would have become unrestricted free agents under the NFL's Collective Bargaining Agreement and could have signed with another team.