Redden agreed to a deal Friday with the St. Louis Blues, a one-year, $800,000 contract.
"Wade is a solid two-way defenseman," general manager Doug Armstrong said in a statement released by the team. "We believe his experience will complement and add stability to our defensive core."
Redden is scheduled to arrive in St. Louis this weekend and undergo a physical on Sunday.
Redden, 35, has spent the past two seasons with the Connecticut Whale, the Rangers' American Hockey League affiliate. Last season, he posted four goals and 20 points in 49 games.
The 6-foot-2, 205-pound Redden is a veteran of 13 NHL seasons including 11 years in Ottawa and, most recently, two with the Rangers (2008-2010). Overall, Redden has appeared in 994 NHL games totaling 106 goals, 450 points and 654 penalty minutes. The Lloydminster, Saskatchewan native was originally drafted by the New York Islanders with the No. 2 pick in the 1995 NHL Draft.