The Blues signed Jackman to a three-year contract Monday, and the deal is expected to be worth at least $9.5 million over the length of the deal.
Jackman, 31, was the 17th overall pick in 1999 and has spent his entire career with the Blues. He dressed in 81 games for the Blues last season recording one goal, 13 points and 57 penalty minutes while tying for second on the club with a plus-20 rating and leading the team overall in blocked shots (153) and shorthanded time on ice per game (3:26).
"St. Louis is our home and my family and I are excited to be staying," Jackman said in a team-issued release. "I am proud of the progress we made this season but our fans deserve a championship and our team will not be satisfied until we achieve that goal."
He's 10th all-time in team history in games played and 10th in points by a Blues' defeseman.
"Barret has been a solid leader for our club, on and off the ice, and we're happy to have him in the fold for the next three years," general manager Doug Armstrong said. "He's a staple of the organization and the community and his positive influence on our young core has and will remain an invaluable asset."