News came from the mouth of Williams' agent Angelo Wright, saying "trust me, I know what Pat Williams is doing. Pat Williams is playing."
Williams told reporters after the 31-28 loss to New Orleans in the NFC Championship Game that he was "50-50" on his decision to retire this off season.
Wright added "I talked to Pat Williams three or four times in the last week. He'll be playing next season."
Despite elbow and shoulder injuries, the 37-year-old Williams finished the '09 season with 44 tackles and two sacks, playing a key role in the Vikings second-place run defense.
Williams is slated to earn $4.25 million during a season in which he will be turning 38.
Vikings VP of Player Personnel told Judd Zulgad of the Minneapolis Star Tribune, "we are so early in the off season yet, but we are anticipating all of our players being back. Now Pat had injured his elbow toward the [end] of the season, missed a [game], but played very well in the Dallas game. He played excellent in the New Orleans game. So right now as far as we know Pat Williams is going to be back and be a Minnesota Viking next year."