The now defunct Missouri River Otters were a minor pro team in the United Hockey League from 1999 to 2006. They were located in St. Charles, Missouri, a suburb of St. Louis. Mike Shanahan Jr. was the owner and president when the team ceased operations. Frank Buonomo served as General Manager. They played all of their home games at the St. Charles Family Arena which opened in October 1999.
After the NHL lockout in 2004-2005, NHL Defensemen Barret Jackman decided to stay in St. Louis and play hockey for the River Otters during the lockout, along with Center Ryan Johnson, Defenseman Bryce Salvador and Right Winger Jamal Mayers
On January 25th 2006 The Missouri River Otters hosted the 2006 United Hockey League All Star Classic which included events such as the UHL Alumni vs The St. Louis Blues Alumni in a pre game show to raise money for St. Louis Children's Hospital. And a special visit to Children's hospital to all of the United Hockey League Team Mascots and All Star Players.
In late April 2006, Mike Shannahan Jr. Decided to fold the team due to lack of attendance, Issues with the lease at the Family Arena and a steep workmans comp bill. The staff was then let go as the announcement was made that the team would not play in the up coming 2006-07 United Hockey League season. While leaving open the possibility of a sale, owner Mike Shanahan Jr. said that the competition for the sports dollar in the greater St. Louis area meant that the team would likely fold instead of being sold.