Jackson was a restricted free agent who was given a one-year tender worth $1.176 million. Defensive end Ray Edwards is the only Vikings restricted free agent who hasn't signed his tender.
Jackson backed up Favre last season and appeared in eight games. Jackson has 19 starts in four NFL seasons, with 21 career touchdowns passing and four rushing.
A second-round draft pick out of Alabama State in 2006, Jackson became the Vikings' first-string quarterback in 2007. He started all 12 games in which he appeared, missing the other four with a variety of injuries: strained groin, broken finger and a concussion. He also has had knee problems during his career.
Jackson struggled in his only playoff appearance, after the 2008 season, completing 15 of 35 passes for 164 yards in a loss to the Philadelphia Eagles.
Copyright 2010 by The Associated Press