| 2021-06-16 19:30:32Wednesday, June 16, 2021 | Leicester Lion Cubs v Mildenhall Fen Tigers | 19:30:327:30 pm | 45 - 45 | National Development League | Paul Chapman & Sons Arena |
| 2021-06-20 11:02:50Sunday, June 20, 2021 | Mildenhall Fen Tigers v Eastbourne Seagulls | 11:02:50Postponed | P - P | National Development League | Mildenhall Stadium |
| 2021-07-04 15:00:50Sunday, July 4, 2021 | Mildenhall Fen Tigers v Berwick Bullets | 15:00:50Postponed | P - P | National Development League | Mildenhall Stadium |
| 2021-07-18 15:00:50Sunday, July 18, 2021 | Mildenhall Fen Tigers v Kent Royals | 15:00:503:00 pm | 43 - 47 | National Development League | Mildenhall Stadium |
| 2021-07-24 19:00:08Saturday, July 24, 2021 | Berwick Bullets v Mildenhall Fen Tigers | 19:00:087:00 pm | 46 - 44 | National Development League | Shielfield Park |
| 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 |
| 2021-08-08 15:00:50Sunday, August 8, 2021 | Mildenhall Fen Tigers v Belle Vue Colts | 15:00:503:00 pm | 46 - 44 | National Development League | Mildenhall Stadium |
| 2021-08-21 00:05:57Saturday, August 21, 2021 | Eastbourne Seagulls v Mildenhall Fen Tigers | 00:05:57Postponed | P - P | National Development League | Arlington Stadium |
| 2021-09-03 19:30:38Friday, September 3, 2021 | Belle Vue Colts v Mildenhall Fen Tigers | 19:30:387:30 pm | 39 - 51 | National Development League | National Speedway Stadium |
| 2021-09-12 15:00:50Sunday, September 12, 2021 | Mildenhall Fen Tigers v Leicester Lion Cubs | 15:00:503:00 pm | 47 - 41 | National Development League | Mildenhall Stadium |
| 2021-09-19 10:00:09Sunday, September 19, 2021 | Mildenhall Fen Tigers v Ex-Mildenhall Fen Tigers | 10:00:09Postponed | P - P | Challenge | Mildenhall Stadium |
| 2021-09-26 15:00:19Sunday, September 26, 2021 | Mildenhall Fen Tigers v Berwick Bullets | 15:00:193:00 pm | 61 - 29 | National Development League | Mildenhall Stadium |
| 2021-10-19 18:30:00Tuesday, October 19, 2021 | Kent Royals v Mildenhall Fen Tigers | 18:30:006:30 pm | 44 - 45 | National Development League | Central Park 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 |
