Source: Blues re-sign Barret Jackman
The defenseman was scheduled to be an unrestricted free agent July 1.
Jackman struggled during the playoffs, but Blues general manager Doug Armstrong has said the team still valued his contributions.
"He's a player that we told him we appreciate what he's done here," Armstrong said.
"We have to make decisions internally or look externally via trade or free agency," Armstrong has said. "We do need to improve the left side of our defense."
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