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Seattle Mariners vs Athletics prediction for 21 Apr 2026, 09:40 SGT (MLB). Recent form, head-to-head and real positions of profitable pros on Polymarket/Kalshi.
Final score: Seattle Mariners 4:6 Athletics (2026-04-21).
Seattle Mariners, last 5: W W L L L. Athletics, last 5: L W L L W. Head-to-head, last 5 meetings (Seattle Mariners wins – draws – Athletics wins): 2-0-3; latest 2025-08-25: Seattle Mariners 11:4 Athletics.
Sources: public prices and positions on Polymarket and Kalshi; results from public sports data. Data as of 2026-04-21 11:51 UTC+8. How we calculate: methodology
| 2026-04-20 | vs Texas Rangers | 5:2 | W |
| 2026-04-19 | vs Texas Rangers | 7:3 | W |
| 2026-04-18 | vs Texas Rangers | 0:5 | L |
| 2026-04-17 | vs San Diego Padres | 2:5 | L |
| 2026-04-16 | vs San Diego Padres | 6:7 | L |
| 2026-04-20 | vs Chicago White Sox | 4:7 | L |
| 2026-04-19 | vs Chicago White Sox | 7:6 | W |
| 2026-04-18 | vs Chicago White Sox | 2:9 | L |
| 2026-04-17 | vs Texas Rangers | 6:9 | L |
| 2026-04-16 | vs Texas Rangers | 6:5 | W |
| 2025-08-25 | Seattle Mariners | 11:4 | Athletics |
| 2025-08-24 | Seattle Mariners | 1:2 | Athletics |
| 2025-08-23 | Seattle Mariners | 3:2 | Athletics |
| 2025-07-31 | Athletics | 5:4 | Seattle Mariners |
| 2025-07-30 | Athletics | 6:1 | Seattle Mariners |
| Date | Match | Pick | Result |
|---|---|---|---|
| 2026-04-21 | fatdog-012 Polymarket | Athletics -1.5 spread | Won |
| 2026-04-21 | fatdog-012 Polymarket | Athletics vs Seattle Mariners O/U 9.5 | Won |
| 2026-04-21 | fatdog-012 Polymarket | Seattle Mariners -3.5 spread | Lost |
| 2026-04-21 | fatdog-012 Polymarket | Will there be a run scored in the first inning?: Athletics vs. Seattle Mariners | Lost |
| 2026-04-21 | fatdog-012 Polymarket | Seattle Mariners -1.5 spread | Won |
| 2026-04-21 | inventa Polymarket | Seattle Mariners to win | Lost |