| D | Cameron Crotty |  OTTOttawa Senators |
| D | Cameron GaunceInactive | — |
| D | Cameron SchillingInactive | — |
| D | Cam Fowler |  STLSt. Louis Blues |
| D | Cam York |  PHIPhiladelphia Flyers |
| D | Carl DahlstromInactive | — |
| D | Carl GunnarssonInactive | — |
| D | Carson Lambos |  MINMinnesota Wild |
| D | Carson SoucyInactive | — |
| D | Carter Yakemchuk | OTTOttawa Senators |
| D | Casey FitzgeraldInactive | — |
| D | Casey NelsonInactive | — |
| D | Chad RuhwedelInactive | — |
| D | Charle-Edouard D'Astous |  TBLTampa Bay Lightning |
| D | Charles Alexis LegaultInactive | — |
| D | Charlie McAvoy |  BOSBoston Bruins |
| D | Chase PriskieInactive | — |
| D | Chris BigrasInactive | — |
| D | Chris ButlerInactive | — |
| D | Chris Tanev |  TORToronto Maple Leafs |
| D | Christian DjoosInactive | — |
| D | Christian FolinInactive | — |
| D | Christian JarosInactive | — |
| D | Christian WolaninInactive | — |
| D | Chris WidemanInactive | — |
| D | Clayton StonerInactive | — |
| D | Cody Ceci |  LAKLos Angeles Kings |
| D | Cody FransonInactive | — |
| D | Cody GoloubefInactive | — |
| D | Cole Hutson |  WSHWashington Capitals |
| D | Cole McWardInactive | — |
| D | Colin MillerInactive | — |
| D | Colton Parayko | STLSt. Louis Blues |
| D | Colton WhiteInactive | — |
| D | Connor CarrickInactive | — |
| D | Connor Clifton | BOSBoston Bruins |
| D | Connor MackeyInactive | — |
| D | Connor Murphy |  EDMEdmonton Oilers |
| D | Conor Timmins |  BUFBuffalo Sabres |
| D | Corey Schueneman |  ANAAnaheim Ducks |
| D | Daemon Hunt | MINMinnesota Wild |
| D | Dakota MermisInactive | — |
| D | Dalton ProutInactive | — |
| D | Damon Severson |  CBJColumbus Blue Jackets |
| D | Dan GirardiInactive | — |
| D | Dan HamhuisInactive | — |
| D | Daniel BrickleyInactive | — |
| D | Daniil MiromanovInactive | — |
| D | Daniil MisyulInactive | — |
| D | Danny DeKeyserInactive | — |