Head to Head
| MLB Spring Training | 2023/03/14 20:10 | SEA Mariners v KC Royals | L | 8-6 |
| MLB Exhibition | 2023/02/26 20:05 | SEA Mariners v KC Royals | W | 7-8 |
| MLB | 2022/09/25 18:10 | SEA Mariners v KC Royals | W | 12-13 |
| MLB | 2022/09/24 23:10 | SEA Mariners v KC Royals | L | 6-5 |
| MLB | 2022/09/24 00:10 | SEA Mariners v KC Royals | W | 1-5 |
| MLB | 2022/04/24 20:10 | KC Royals v SEA Mariners | L | 4-5 |
| MLB | 2022/04/24 01:10 | KC Royals v SEA Mariners | L | 7-13 |
| MLB | 2022/04/23 01:40 | KC Royals v SEA Mariners | L | 1-4 |
| MLB Spring Training | 2022/04/03 20:05 | SEA Mariners v KC Royals | L | 10-8 |
| MLB Exhibition | 2022/03/29 20:10 | KC Royals v SEA Mariners | W | 11-4 |
| MLB | 2021/09/19 18:10 | SEA Mariners v KC Royals | L | 7-1 |
| MLB | 2021/09/18 23:10 | SEA Mariners v KC Royals | W | 1-8 |
| MLB | 2021/09/18 00:10 | SEA Mariners v KC Royals | L | 6-2 |
| MLB | 2021/08/29 20:10 | KC Royals v SEA Mariners | L | 3-4 |
| MLB | 2021/08/28 20:10 | KC Royals v SEA Mariners | W | 4-2 |
| MLB | 2021/08/28 02:10 | KC Royals v SEA Mariners | W | 8-7 |
| MLB | 2021/08/27 02:10 | KC Royals v SEA Mariners | W | 6-4 |
| MLB Exhibition | 2021/03/17 01:05 | SEA Mariners v KC Royals | L | 13-0 |
| MLB Spring Training | 2021/03/09 20:10 | KC Royals v SEA Mariners | L | 3-6 |
| MLB Exhibition | 2020/02/29 20:10 | KC Royals v SEA Mariners | W | 9-6 |
| MLB | 2019/06/19 22:40 | KC Royals v SEA Mariners | L | 2-8 |
| MLB | 2019/06/19 02:10 | KC Royals v SEA Mariners | W | 9-0 |
| MLB | 2019/06/18 02:10 | KC Royals v SEA Mariners | W | 6-4 |
| MLB | 2019/04/11 17:15 | SEA Mariners v KC Royals | L | 7-6 |
| MLB | 2019/04/11 00:15 | SEA Mariners v KC Royals | L | 6-5 |
| MLB | 2019/04/10 00:15 | SEA Mariners v KC Royals | L | 6-3 |
| MLB | 2019/04/09 00:15 | SEA Mariners v KC Royals | L | 13-5 |
| MLB Spring Training | 2019/03/12 01:40 | SEA Mariners v KC Royals | W | 1-5 |
| MLB Spring Training | 2019/03/02 20:05 | SEA Mariners v KC Royals | W | 0-8 |
| MLB | 2018/07/01 20:10 | KC Royals v SEA Mariners | L | 0-1 |