| Miro Aaltonen |  | C | TOR | |
| Spencer Abbott |  | RW/LW | UFA | |
| 8 | Justin Abdelkader |  | RW/LW | DET | Versatile, two-way agitating forward. |
| 20 | Pontus Aberg |  | RW/LW | ANA | Speedy scoring winger with a little upside. |
| Rodrigo Abols |  | C | VAN | |
| 43 | Vitali Abramov |  | RW/LW | CBJ | Exciting, productive winger with upside. |
| 55 | Noel Acciari | | RW/C | BOS | Hard-hitting, depth forward. |
| Jack Adams | | RW | DET | |
| Collin Adams | | LW | NYI | |
| 64 | Jeremiah Addison | | LW | MTL | Solid, hard-working winger with some upside. |
| Calen Addison | | D | PIT | Talented offensive defenseman with upside. |
| 18 | Kenny Agostino | | LW | MTL | Speedy depth winger. |
| 26 | Andrew Agozzino | | LW | COL | Diminutive depth forward. |
| Filip Ahl | | LW/RW | OTT | Big, strapping winger with some upside. |
| 20 | Sebastian Aho | | C/LW | CAR | Skilled, talented playmaker with good upside. |
| 28 | Sebastian Aho | | D | NYI | Diminutive, skilled puck-moving defenseman with some upside. |
| 68 | Alexandre Alain | | RW/C | MTL | |
| John Albert | | C | UFA | Hard-working depth forward. |
| Alexander Alexeyev | | D | WSH | Big, mobile, all-around defenseman with upside. |
| 72 | Frederic Allard | | D | NSH | Flashy offensive defenseman with upside. |
| 34 | Jake Allen | | G | STL | Talented, quality goaltender with a little upside. |
| Wade Allison | | RW | PHI | Power forward with some upside. |
| Niclas Almari | | D | PIT | |
| Justin Almeida | | C | PIT | |
| Adam Almquist | | D | DET | |
| 7 | Mark Alt | | D | COL | Big, depth defenseman. |
| Daniel Altshuller | | G | UFA | Depth goaltender. |
| Andrei Altybarmakyan | | RW | CHI | |
| 27 | Karl Alzner | | D | MTL | Big-minute, shutdown defenseman. |
| 10 | Michael Amadio | | C/RW | LAK | Solid, two-way center with some upside. |
| Terrance Amorosa | | D | PHI | |
| 48 | Sam Anas | | C/RW | MIN | Diminutive but talented playmaker with some upside. |
| 31 | Frederik Andersen |  | G | TOR | Big, talented goaltender with a little upside, when healthy. |
| 77 | Josh Anderson | | RW | CBJ | Big, versatile and gritty winger with some upside. |
| 76 | Josh Anderson | | D | COL | |
| Mikey Anderson | | D | LAK | |
| 49 | Joey Anderson | | RW | NJD | Solid, complementary winger with upside. |
| 41 | Craig Anderson | | G | OTT | Quality veteran goaltender. |
| 28 | Jaret Anderson-Dolan | | LW/C | LAK | Quality, high-energy forward with upside. |
| Axel Andersson | | D | BOS | Mobile, puck-moving defenseman with upside. |
| 4 | Rasmus Andersson | | D | CGY | Solid, all-round defenseman with some upside. |
| 50 | Lias Andersson | | C | NYR | Gritty, versatile two-way forward with upside. |
| Anton Andersson | | D | STL | |
| Andy Andreoff | | LW/C | TBL | Versatile, agitating depth forward. |
| 10 | Sven Andrighetto |  | LW/RW | COL | Diminutive, skilled forward with some upside. |
| Sergey Andronov | | RW/LW | STL | |
| 82 | Jonathan Ang | | C | FLA | Diminuitive, speedy center with upside. |
| 57 | Anthony Angello | | C | PIT | |
| 15 | Artem Anisimov | | C | CHI | Big, versatile two-way center. |
| Justus Annunen | | G | COL | Big, talented goalkeeper with upside. |
| Victor Antipin |  | D | UFA | Sound, mobile defenseman with a little upside. |
| Ken Appleby | | G | UFA | Big, solid goaltender with some upside. |
| 82 | Mason Appleton | | C | WIN | Quality playmaker with upside. |
| 45 | Josh Archibald | | RW/C | ARZ | Hard-working, depth forward. |
| 49 | Darren Archibald | | LW/RW | VAN | Big, depth forward. |
| Mantas Armalis |  | G | UFA | |
| 40 | Joel Armia | | RW | MTL | Talented, versatile winger with some upside. |
| Linus Arnesson | | D | BOS | |
| Taylor Aronson | | D | NSH | |
| 33 | Viktor Arvidsson | | RW | NSH | Undersized, skilled winger with some upside. |
| Carter Ashton | | LW/RW | TBL | |
| 74 | Rasmus Asplund | | C | BUF | Fast, cerebral two-way forward with upside. |
| 46 | Zach Aston-Reese | | LW | PIT | |
| 72 | Andreas Athanasiou | | W/C | DET | Speedy, talented and versatile forward with upside. |
| 13 | Cam Atkinson | | RW | CBJ | Diminutive but solid scoring winger. |
| 62 | Nicolas Aube-Kubel | | RW | PHI | Talented, diminutive winger with upside. |
| 48 | Daniel Audette | | C | MTL | |
| Justin Auger | | RW | UFA | Mammoth winger with a little upside. |
| Gage Ausmus | | D | UFA | |
| Brady Austin | | D | UFA | |
| Yohann Auvitu |  | D | UFA | Solid offensive defenseman. |