| Date/Season | Transaction |
|---|
| 11/24/2021 | Buffalo Sabres send Mattias Backman, Cal Foote, WSH 2027 Rnd 3 to the Vegas Golden Knights for Johnny Boychuk, Connor McDavid, $1,100,000 |
| 8/21/2021 | Detroit Red Wings send Alexander Alexeyev (rental), Mattias Backman to the Buffalo Sabres for Erik Johnson (rental), Ivan Morozov, NAS 2029 Rnd 3 |
| 1/28/2019 | Philadelphia Flyers send Mattias Backman, STL 2023 Rnd 3 to the Detroit Red Wings for Chad Krys, NJD 2023 Rnd 2 |
| 8/9/2017 | Philadelphia Flyers send Michael Funk, Ryan Getzlaf (rental) to the Nashville Predators for Alex Bourret, Darroll Powe, Mattias Backman, NAS 2026 Rnd 2 |
| 2018 | Drafted in the 1st round, 30th overall by Nashville (from Pittsburgh) |
