He will wear No. 9.
Upshall, 33, spent the previous two seasons with the Blues, including the 2016-17 season when he collected 18 points (10 goals, eight assists) in 73 regular season games.
The 6-foot, 200-pound forward also served eight penalty minutes in 11 postseason appearances in 2017.
Overall, Upshall has appeared in 14 NHL seasons, including stints with Nashville, Philadelphia, Phoenix, Columbus, Florida and St. Louis. The Fort McMurray, Alberta native has recorded 266 points (131 goals, 135 assists) and 569 penalty minutes in 696 career regular season games, as well as 13 points (five goals, eight assists) and 66 penalty minutes in 54 career postseason games.
Upshall was originally drafted sixth overall by Nashville in the 2002 NHL Draft.
