Huskins, 32, played in 50 games for the San Jose Sharks last season, tallying 10 points (2 goals, 8 assists) along with 12 penalty minutes. The 6-foot-4, 210-pounder also posted a plus-8 rating -- his fourth consecutive season of being a plus player (plus-43).
Huskins captured a Stanley Cup with the Anaheim Ducks in 2007 and has played in five National Hockey League (NHL) seasons, recording 60 points (11 goals, 49 assists) along with 159 penalty minutes in 274 career games.
"Kent brings size and leadership to our defensive corps and we are looking forward to him joining the Blues," GM Doug Armstrong said.
A native of Almonte, Ontario, Huskins was originally drafted by the Chicago Blackhawks in the sixth round (No. 156) of the 1998 Entry Draft.