Doug Armstrong

St. Louis Blues acquire Date Detroit Red Wings acquire
Nick Leddy
 Luke Witkowski
March 21, 2022
Oskar Sunqvist
 Jake Walman
 2023 2nd round pick
St. Louis Blues acquire Date Minnesota Wild acquire
Will Bitten
December 29, 2021
Nolan Stevens
New Jersey Devils acquire Date St. Louis Blues acquire
Jon Gillies
December 15, 2021
Future considerations
Toronto Maple Leafs acquire Date St. Louis Blues acquire
Kyle Clifford
November 16, 2021
Future considerations
Ottawa Senators acquire Date St. Louis Blues acquire
Zach Sanford
September 25, 2021
2022 conditional 4th round pick
 Logan Brown
Comment: If Brown plays more than 30 regular season games in 2021-22, the conditional draft pick will be removed from the deal.
St. Louis Blues acquire Date New York Rangers acquire
Pavel Buchnevich
July 23, 2021
Sammy Blais
 2022 2nd round pick
Montreal Canadiens acquire Date St. Louis Blues acquire
Jake Allen
 2022 7th round pick
September 2, 2020
2020 3rd round pick
 2020 7th round pick
St. Louis Blues acquire Date Montreal Canadiens acquire
Marco Scandella
February 18, 2020
2020 2nd round pick
 2021 conditional 4th round pick
Comment: If St-Louis re-signs Scandella prior to Oct. 7, 2020, or if they win two playoff rounds and he plays in at least half of the games in the first two rounds, Montreal gets a fourth in 2021.
Detroit Red Wings acquire Date St. Louis Blues acquire
Robby Fabbri
November 6, 2019
Jacob De La Rose
St. Louis Blues acquire Date Carolina Hurricanes acquire
Justin Faulk
 2020 5th round pick
September 24, 2019
Joel Edmundson
 Dominik Bokk
 2021 7th round pick
Toronto Maple Leafs acquire Date St. Louis Blues acquire
Jordan Schmaltz
July 25, 2019
Andreas Borgman
St. Louis Blues acquire Date Anaheim Ducks acquire
Michael Del Zotto
February 25, 2019
2019 6th round pick
St. Louis Blues acquire Date Anaheim Ducks acquire
Jared Coreau
January 3, 2019
Future considerations
St. Louis Blues acquire Date Edmonton Oilers acquire
Jakub Jerabek
October 1, 2018
2019 6th round pick
St. Louis Blues acquire Date Buffalo Sabres acquire
Ryan O`Reilly
July 1, 2018
Vladimir Sobotka
 Patrik Berglund
 Tage Thompson
 2019 1st round pick
 2021 2nd round pick
Winnipeg Jets acquire Date St. Louis Blues acquire
Paul Stastny
February 26, 2018
Erik Foley
 2018 conditional 1st round pick
 2020 conditional 4th round pick
Comment: If Winnipeg's pick is Nos. 1-3 in 2018, Blues will receive Jets' first-rounder in 2019. Otherwise, they get the 2018 1st round pick. If Blues don't re-sign Foley before Aug. 16, 2019, then they receive Jets' 4th rounder in 2020.
St. Louis Blues acquire Date Toronto Maple Leafs acquire
Nikita Soshnikov
February 15, 2018
2019 4th round pick
St. Louis Blues acquire Date Philadelphia Flyers acquire
Brayden Schenn
June 23, 2017
Jori Lehtera
 2017 1st round pick
 2018 conditional 1st round pick
Pittsburgh Penguins acquire Date St. Louis Blues acquire
Ryan Reaves
 2017 2nd round pick
June 23, 2017
Oskar Sundqvist
 2017 1st round pick
Washington Capitals acquire Date St. Louis Blues acquire
Kevin Shattenkirk
 Pheonix Copley
February 27, 2017
Zach Sanford
 Brad Malone
 2017 1st round pick
 2019 conditional 2nd round pick