| 2021-05-01 19:00:08Saturday, May 1, 2021 | Berwick Bullets v Armadale Devils | 19:00:087:00 pm | 50 - 40 | National Development League | Shielfield Park |
| 2021-05-07 19:30:34Friday, May 7, 2021 | Armadale Devils v Berwick Bullets | 19:30:347:30 pm | 48 - 42 | National Development League | Armadale Stadium |
| 2021-05-14 19:30:34Friday, May 14, 2021 | Armadale Devils v Newcastle Gems | 19:30:347:30 pm | 43 - 46 | National Development League | Armadale Stadium |
| 2021-05-29 19:00:32Saturday, May 29, 2021 | Leicester Lion Cubs v Armadale Devils | 19:00:327:00 pm | 50 - 40 | National Development League | Paul Chapman & Sons Arena |
| 2021-06-06 18:00:23Sunday, June 6, 2021 | Newcastle Gems v Armadale Devils | 18:00:236:00 pm | 55 - 33 | National Development League | Newcastle Stadium |
| 2021-06-19 14:30:34Saturday, June 19, 2021 | Armadale Devils v Belle Vue Colts | 14:30:342:30 pm | 48 - 42 | National Development League | Armadale Stadium |
| 2021-07-02 19:30:34Friday, July 2, 2021 | Armadale Devils v Leicester Lion Cubs | 19:30:34Abandoned | 7 - 4 | National Development League | Armadale Stadium |
| 2021-08-01 15:00:50Sunday, August 1, 2021 | Mildenhall Fen Tigers v Armadale Devils | 15:00:503:00 pm | 50 - 39 | National Development League | Mildenhall Stadium |
| 2021-08-20 19:30:38Friday, August 20, 2021 | Belle Vue Colts v Armadale Devils | 19:30:387:30 pm | 51 - 39 | National Development League | National Speedway Stadium |
| 2021-09-17 19:30:03Friday, September 17, 2021 | Armadale Devils v Kent Royals | 19:30:037:30 pm | 47 - 43 | National Development League | Armadale Stadium |
| 2021-09-24 19:30:48Friday, September 24, 2021 | Armadale Devils v Leicester Lion Cubs | 19:30:487:30 pm | 50 - 40 | National Development League | Armadale Stadium |
| 2021-10-23 16:15:46Saturday, October 23, 2021 | Armadale Devils v Mildenhall Fen Tigers | 16:15:464:15 pm | 34 - 56 | National Development League | Armadale Stadium |
| 2021-10-31 00:05:00Sunday, October 31, 2021 | Kent Royals v Armadale Devils | 00:05:00Postponed | P - P | National Development League | Paul Chapman & Sons Arena |
