The Blues have signed defenseman Nate Prosser to a two-year, two-way contract.
Prosser, 31, has appeared in parts of eight NHL seasons - all with the Minnesota Wild - where he played in 282 regular-season games, recording seven goals, 31 assists (38 points) and a minus-9 rating.
Last season, Prosser played 39 games for the Wild, registering two goals and five assists.
The 6-foot-2, 201-pound native of Elk River, MN played in a career high 63 games for head coach Mike Yeo during the 2014-15 season.
Prosser previously joined the Blues at training camp in 2014, but was claimed by Minnesota off waivers before the season began.