With the Maple Leafs development camp starting on Monday with physicals in Toronto before heading to Niagara Falls, Ontario for the week, the team has released the full roster just before the long weekend:
| Player | Position | 15/16 Club | League | Stats (G-A-P) |
| Stephen Baylis | F | Bowling Green | NCAA | 35GP - 9-13-22 |
| Vladimir Bobylev | F | Victoria Royals | WHL | 72GP -28-39-67 |
| Jeremy Bracco | F | Kitchener Rangers | OHL | 49GP - 21-43-64 |
| Adam Brooks | F | Regina Pats | WHL | 72GP - 38-82-120 |
| Shane Conacher | F | Canisius College | NCAA | 39GP - 20-26-46 |
| Martins Dzierkals | F | Rouyn-Noranda Huskies | QMJHL | 59GP - 24-43-67 |
| Pierre Engvall | F | Mora IK | Allsvenskan | 50GP - 12-12-24 |
| Tye Felhaber | F | Saginaw Spirit | OHL | 64GP - 18-20-38 |
| Carl Grundstrom | F | MODO | SHL | 49GP - 7-9-16 |
| Dakota Joshua | F | Ohio State | NCAA | 29GP - 5-12-17 |
| Nikita Korostelev | F | Sarnia Sting | OHL | 53GP - 23-19-42 |
| Alan Lyszczarczyk | F | Sudbury Wolves | OHL | 67GP - 17-33-50 |
| Mason Marchment | F | Mississauga Steelheads | OHL | 27GP - 10-8-18 |
| Mitchell Marner | F | London Knights | OHL | 57GP - 39-77-116 |
| Auston Matthews | F | Zurich Lions | OHL | 36GP - 24-22-46 |
| Trevor Moore | F | Denver | NCAA | 40GP - 11-33-44 |
| JJ Piccinich | F | London Knights | OHL | 66GP - 30-33-66 |
| Brandon Saigeon | F | Hamilton Bulldogs | OHL | 43GP - 4-10-14 |
| Dmytro Timashov | F | Shawinigan Cataractes | QMJHL | 57GP - 22-43-65 |
| Dominic Toninato | F | Minnesota-Duluth | NCAA | 40GP - 15-6-21 |
| Nolan Vesey | F | Maine | NCAA | 36GP - 5-6-11 |
| Jack Walker | F | Victoria Royals | WHL | 72GP - 36-48-84 |
| Chase Witala | F | Prince George Cougars | WHL | 71GP - 40-39-79 |
| Tyler Wong | F | Lethbridge Hurricanes | WHL | 72GP - 43-46-89 |
| Nikolas Brouillard | D | Rouyn-Noranda Huskies | QMJHL | 54GP - 17-42-59 |
| Travis Dermott | D | Erie Otters | OHL | 51GP - 6-37-43 |
| Stephen Desrocher | D | Kingston Frontenacs | OHL | 52GP - 6-29-35 |
| James Greenway | D | USNTDP U18 | Team USA | 64GP - 5-23-28 |
| Jon Jutzi | D | Minnesota State | NCAA | 41GP - 5-10-15 |
| Jesper Lindgren | D | MODO | SHL | 26GP - 2-1-3 |
| Nikita Lisov | D | Admiral Vladivostok | KHL | 53GP - 1-7-8 |
| Nicolas Mattinen | D | London Knights | OHL | 39GP - 4-6-10 |
| Keaton Middleton | D | Saginaw Spirit | OHL | 66GP - 1-6-7 |
| Jordan Murray | D | U. |