Head to Head
| MLB Spring Training | 2021/03/09 20:10 | KC Royals v SEA Mariners | W | 3-6 |
| MLB Exhibition | 2020/02/29 20:10 | KC Royals v SEA Mariners | L | 9-6 |
| MLB | 2019/06/19 22:40 | KC Royals v SEA Mariners | W | 2-8 |
| MLB | 2019/06/19 02:10 | KC Royals v SEA Mariners | L | 9-0 |
| MLB | 2019/06/18 02:10 | KC Royals v SEA Mariners | L | 6-4 |
| MLB | 2019/04/11 17:15 | SEA Mariners v KC Royals | W | 7-6 |
| MLB | 2019/04/11 00:15 | SEA Mariners v KC Royals | W | 6-5 |
| MLB | 2019/04/10 00:15 | SEA Mariners v KC Royals | W | 6-3 |
Home History
| MLB Exhibition | 2021/03/15 20:10 | ARI Diamondbacks v SEA Mariners | L | 6-2 |
| MLB Exhibition | 2021/03/14 20:10 | MIL Brewers v SEA Mariners | W | 4-5 |
| MLB Exhibition | 2021/03/13 20:10 | SEA Mariners v COL Rockies | L | 1-2 |
| MLB Exhibition | 2021/03/13 01:40 | CIN Reds v SEA Mariners | W | 3-4 |
| MLB Exhibition | 2021/03/12 01:05 | SEA Mariners v LA Dodgers | D | 4-4 |
| MLB Spring Training | 2021/03/10 20:10 | TEX Rangers v SEA Mariners | L | 17-5 |
| MLB Spring Training | 2021/03/09 20:10 | KC Royals v SEA Mariners | W | 3-6 |
| MLB Spring Training | 2021/03/08 20:05 | SEA Mariners v CLE Guardians | L | 0-10 |
Away History
| MLB Exhibition | 2021/03/15 20:05 | SF Giants v KC Royals | W | 1-6 |
| MLB Exhibition | 2021/03/15 01:05 | KC Royals v LA Dodgers | W | 8-4 |
| MLB Spring Training | 2021/03/13 20:05 | CHI Cubs v KC Royals | W | 2-10 |
| MLB Exhibition | 2021/03/11 20:10 | KC Royals v MIL Brewers | W | 4-2 |
| MLB Exhibition | 2021/03/10 20:05 | CIN Reds v KC Royals | W | 3-9 |
| MLB Spring Training | 2021/03/09 20:10 | KC Royals v SEA Mariners | L | 3-6 |
| MLB Spring Training | 2021/03/08 20:05 | OAK Athletics v KC Royals | W | 3-10 |
| MLB Exhibition | 2021/03/07 20:10 | KC Royals v SD Padres | W | 4-3 |