#21
11 players have worn #21 for the Ottawa Senators
Who's Worn #21
| Player | Pos | Seasons |
|---|---|---|
| Nick Cousins | C | 2024–2027 |
| Mathieu Joseph | R | 2021–2024 |
| Nick Paul | L | 2015–2022 |
| Derek Stepan | C | 2020–2021 |
| Michael Kostka | D | 2015–2016 |
| Nikita Filatov | L | 2011–2012 |
| Ryan Potulny | C | 2010–2011 |
| Jason Smith | D | 2008–2009 |
| Magnus Arvedson | L | 1997–2003 |
| Andreas Johansson | L | 1998–1999 |
| Martin St. Amour | L | 1992–1993 |