Sherman, who has guided the Packers to three straight division titles and four consecutive playoff appearances, on Wednesday made light of analyst Chris Mortensen's prediction during a Sunday pregame show on ESPN.
"If Chris Mortensen is talking about my successor, then he just added 10 years to my career because he has never been right about those things anyway," Sherman said with a smile. "I feel pretty good about it now."
Sherman insists that he has not approached his coaching job any differently this season than in the past. The coach, who was given a two-year contract extension by the team in late August, said that he doesn't feel like he is coaching for his job this season.
The Packers are 0-3 this season, and Sherman has come under a lot of fire from not just TV analysts, but Green Bay's fan base.
"If you feel that way, you can't do your job," Sherman said. "You can't have tunnel vision in what you do. I feel confident in the way I do things. I feel confident in how I do things. I don't lack confidence in that area. If it's not good enough, it's not good enough. But I think we'll win."
The Packers Wednesday signed running back Bobby Purify to the practice squad. To make room on the eight-man developmental unit, the team has released running back Antoineo Harris.
Purify, a 6-foot, 210-pound rookie out of Colorado, spent the summer and preseason with the San Francisco 49ers, who waived him in their final roster reduction earlier this month. The 49ers' second-leading rusher in preseason action, he averaged 4.0 yards on 20 carries (79 yards), and added five receptions for 24 yards.
A non-drafted free agent, Purify signed with San Francisco after rushing for 3,016 yards, third in school history, at Colorado.