Seattle Mariners
Major League Baseball
Home venue: T-Mobile Park — Seattle, WA
Current prospects
| Rank | Prospect | Position | On roster since |
|---|---|---|---|
| 49 | Cole Young | Second Base | 2025-10-21 |
Historical prospects
One row per stint — players with multiple stints appear multiple times.
| From | To | Prospect | Year | Rank | Position |
|---|---|---|---|---|---|
| 2025-09-01 | 2026-02-15 | Harry Ford | 2026 | 71 | Catcher |
| 2025-09-01 | 2026-02-15 | Harry Ford | 2025 | 65 | Catcher |
| 2025-09-01 | 2026-02-15 | Harry Ford | 2024 | 38 | Catcher |
| 2025-05-31 | 2025-10-03 | Cole Young | 2025 | 49 | Second Base |
| 2025-05-31 | 2025-10-03 | Cole Young | 2024 | 37 | Second Base |