Seattle Mariners: where the books disagreed
In the last 30 days, MLB lines on Seattle Mariners games produced a cross-book net edge on 160 game-markets across 23 games — average 4.36% after fees, largest 14.95%. The book most often on one side of those: MyBookie.
Books that disagreed on Seattle Mariners games
| Sportsbook | Game-markets (one side) | Measured vig |
|---|---|---|
| MyBookie | 41 | see page → |
| BetMGM | 38 | see page → |
| betPARX | 27 | see page → |
| FanDuel | 27 | see page → |
| Caesars | 27 | see page → |
| Bovada | 25 | see page → |
| ReBet | 24 | see page → |
| DraftKings | 23 | see page → |
| Hard Rock Bet | 23 | see page → |
| ESPN BET | 18 | see page → |
Opponents in those games: Athletics (51) · Boston Red Sox (26) · Texas Rangers (24) · Los Angeles Angels (20) · Philadelphia Phillies (18) · Chicago Cubs (14) · Colorado Rockies (6) · Toronto Blue Jays (1)
Recent Seattle Mariners examples
Best detection per game-market, most recent first, net of fees. These windows have closed.
| Game | Market | Books | Net edge | Detected |
|---|---|---|---|---|
| Seattle Mariners @ Colorado Rockies | spreads 1.5 | FanDuel + Fliff | 2.32% | Sep 18, 11:07 PM ET |
| Seattle Mariners @ Colorado Rockies | totals 9.5 | DraftKings + Caesars | 2.89% | Sep 18, 11:07 PM ET |
| Seattle Mariners @ Colorado Rockies | totals 10.5 | BetMGM + Hard Rock Bet | 2.88% | Sep 18, 10:37 PM ET |
| Seattle Mariners @ Colorado Rockies | h2h | BetMGM + ESPN BET | 14.95% | Sep 18, 10:37 PM ET |
| Seattle Mariners @ Colorado Rockies | spreads 2.5 | betPARX + ReBet | 0.30% | Sep 18, 9:20 PM ET |
| Seattle Mariners @ Colorado Rockies | spreads 4.5 | betPARX + Caesars | 1.49% | Sep 18, 8:34 PM ET |
| Seattle Mariners @ Los Angeles Angels | spreads 4.5 | DraftKings + MyBookie | 6.36% | Sep 17, 12:32 AM ET |
| Seattle Mariners @ Los Angeles Angels | totals 9.5 | BetRivers + ReBet | 12.09% | Sep 17, 12:32 AM ET |
| Seattle Mariners @ Los Angeles Angels | spreads 5.5 | BetMGM + MyBookie | 9.94% | Sep 17, 12:01 AM ET |
| Seattle Mariners @ Los Angeles Angels | totals 11.5 | BetMGM + Hard Rock Bet | 11.24% | Sep 17, 12:01 AM ET |
| Seattle Mariners @ Los Angeles Angels | h2h | MyBookie + Caesars | 3.51% | Sep 16, 11:46 PM ET |
| Seattle Mariners @ Los Angeles Angels | totals 8.5 | Fanatics Sportsbook + MyBookie | 2.26% | Sep 16, 11:16 PM ET |
| Seattle Mariners @ Los Angeles Angels | spreads 1.5 | BetAnySports + BetMGM | 10.90% | Sep 16, 11:16 PM ET |
| Seattle Mariners @ Los Angeles Angels | totals 10.5 | ESPN BET + MyBookie | 0.49% | Sep 16, 10:30 PM ET |
| Seattle Mariners @ Los Angeles Angels | h2h | DraftKings + ReBet | 6.76% | Sep 16, 12:21 AM ET |
Frequently asked questions
How often do sportsbooks disagree on Seattle Mariners games?
Over the last 30 days our scanner recorded a cross-book net edge on 160 game-markets across 23 Seattle Mariners games — average 4.36% after fees, largest 14.95%, most recently Sep 19, 2026.
Which sportsbooks disagree most on Seattle Mariners?
MyBookie (41 game-markets), BetMGM (38 game-markets), betPARX (27 game-markets). A disagreement needs two books on the same line; the pair pages show which combinations recur.
Can I still bet these?
No — these windows closed within minutes of being recorded. The page is a measurement of how the market behaves around this team; the live dashboard shows what exists right now.