Head to Head
| MLB | 2021/09/19 18:10 | SEA Mariners v KC Royals | W | 7-1 |
| MLB | 2021/09/18 23:10 | SEA Mariners v KC Royals | L | 1-8 |
| MLB | 2021/09/18 00:10 | SEA Mariners v KC Royals | W | 6-2 |
| MLB | 2021/08/29 20:10 | KC Royals v SEA Mariners | W | 3-4 |
| MLB | 2021/08/28 20:10 | KC Royals v SEA Mariners | L | 4-2 |
| MLB | 2021/08/28 02:10 | KC Royals v SEA Mariners | L | 8-7 |
| MLB | 2021/08/27 02:10 | KC Royals v SEA Mariners | L | 6-4 |
| MLB Exhibition | 2021/03/17 01:05 | SEA Mariners v KC Royals | W | 13-0 |
Home History
| MLB | 2021/10/03 19:10 | LA Angels v SEA Mariners | L | 7-3 |
| MLB | 2021/10/03 01:10 | LA Angels v SEA Mariners | W | 4-6 |
| MLB | 2021/10/02 02:10 | LA Angels v SEA Mariners | L | 2-1 |
| MLB | 2021/09/30 02:10 | OAK Athletics v SEA Mariners | W | 2-4 |
| MLB | 2021/09/29 02:10 | OAK Athletics v SEA Mariners | W | 2-4 |
| MLB | 2021/09/28 02:10 | OAK Athletics v SEA Mariners | W | 4-13 |
| MLB | 2021/09/26 20:07 | SEA Mariners v LA Angels | W | 5-1 |
| MLB | 2021/09/26 01:07 | SEA Mariners v LA Angels | L | 1-14 |
Away History
| MLB | 2021/10/03 19:10 | MIN Twins v KC Royals | L | 7-3 |
| MLB | 2021/10/02 23:10 | MIN Twins v KC Royals | L | 4-0 |
| MLB | 2021/10/02 00:10 | MIN Twins v KC Royals | W | 6-11 |
| MLB | 2021/10/01 00:10 | CLE Guardians v KC Royals | L | 6-1 |
| MLB | 2021/09/30 00:10 | CLE Guardians v KC Royals | W | 5-10 |
| MLB | 2021/09/29 00:10 | CLE Guardians v KC Royals | W | 4-6 |
| MLB | 2021/09/27 17:10 | KC Royals v CLE Guardians | L | 3-8 |
| MLB | 2021/09/26 16:10 | KC Royals v DET Tigers | W | 2-1 |