| D | Luke WitkowskiInactive | — |
| D | Mac HollowellInactive | — |
| D | MacKenzie Weegar |  UTAUtah Mammoth |
| D | Madison BoweyInactive | — |
| D | Maksymilian Szuber |  MTLMontréal Canadiens |
| D | Marc Del GaizoInactive | — |
| D | Marc-Edouard VlasicInactive | — |
| D | Marc MethotInactive | — |
| D | Marco ScandellaInactive | — |
| D | Marc StaalInactive | — |
| D | Marcus BjorkInactive | — |
| D | Marcus Pettersson |  NYRNew York Rangers |
| D | Marek AlscherInactive | — |
| D | Mario Ferraro |  WPGWinnipeg Jets |
| D | Mark AltInactive | — |
| D | Mark BarberioInactive | — |
| D | Mark BorowieckiInactive | — |
| D | Mark FayneInactive | — |
| D | Mark FriedmanInactive | — |
| D | Mark GiordanoInactive | — |
| D | Mark PysykInactive | — |
| D | Mark StreitInactive | — |
| D | Mark StuartInactive | — |
| D | Markus NiemelainenInactive | — |
| D | Markus NutivaaraInactive | — |
| D | Marshall RifaiInactive | — |
| D | Marshall WarrenInactive | — |
| D | Martin Fehervary |  WSHWashington Capitals |
| D | Martin MarincinInactive | — |
| D | Mason Lohrei |  BOSBoston Bruins |
| D | Mathew DumbaInactive | — |
| D | Matt BartkowskiInactive | — |
| D | Matt CarleInactive | — |
| D | Matt DonovanInactive | — |
| D | Matt GreeneInactive | — |
| D | Matt GrzelcykInactive | — |
| D | Matthew BenningInactive | — |
| D | Matthew Kessel |  NYINew York Islanders |
| D | Matthew Robertson | NYRNew York Rangers |
| D | Matthew Schaefer | NYINew York Islanders |
| D | Matt HunwickInactive | — |
| D | Mattias Ekholm |  EDMEdmonton Oilers |
| D | Mattias NorlinderInactive | — |
| D | Mattias Samuelsson |  BUFBuffalo Sabres |
| D | Matt IrwinInactive | — |
| D | Matt Kiersted |  MINMinnesota Wild |
| D | Matt NiskanenInactive | — |
| D | Matt Roy | WSHWashington Capitals |
| D | Matt TennysonInactive | — |
| D | Maveric Lamoureux | UTAUtah Mammoth |