Seattle Mariners @ Boston Red Sox
Mon Aug 31, 6:46 PM ET
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Odds from the latest scan: August 31, 5:35 AM ET. Live odds for this game.
Hard Rock Bet pays the most on Seattle Mariners at +155, and Novig pays the most on Boston Red Sox at -150. Across the 20 books pricing this game the best and worst numbers are $27.00 apart on a $100 bet.
Best MLB price on Seattle Mariners vs Boston Red Sox, compared across every major US sportsbook plus Kalshi, Polymarket US, ProphetX and Novig. Mon Aug 31, 6:46 PM ET.
Games starting within 24 hours refresh every minute; later games every 30 minutes and every hour as kickoff approaches during the beta; the free board refreshes hourly.
Moneyline Line HistorySeattle Mariners +155 Hard Rock Bet·Boston Red Sox -150 Novig
Every Book's Moneyline
| Book | Seattle Mariners | Boston Red Sox |
|---|---|---|
| Novig | +147 | -150 |
| BetRivers | +132 | -155 |
| Bally Bet | +128 | -157 |
| BetParx | +128 | -157 |
| Polymarket US | +138 | -159 |
| ProphetX | +143 | -159 |
| Caesars | +150 | -160 |
| BetOnline | +147 | -163 |
| LowVig | +147 | -163 |
| Hard Rock Bet | +155 | -165 |
| theScore Bet | +140 | -165 |
| Pinnacle | +148 | -165 |
| FanDuel | +140 | -166 |
| Kalshi | +139 | -167 |
| MyBookie | +143 | -169 |
| Fliff | +140 | -170 |
| Fanatics | +140 | -170 |
| DraftKings | +141 | -171 |
| Bovada | +143 | -174 |
| BetMGM | +145 | -175 |
Spread Line HistorySeattle Mariners +1.5 (-145) Hard Rock Bet·Boston Red Sox -1.5 (+136) FanDuel
Total Line HistoryOver 8 (+101) Pinnacle·Under 8 (-113) LowVig
About These Charts
Player Props
20 books priced this game. Prediction market prices include trading fees wherever a fee applies, so they are directly comparable to sportsbook lines.
On Seattle Mariners vs Boston Red Sox, the best available price is not the same at every book. One sportsbook might post a side at -110 while another has it at -102, and taking the better number is the one edge you fully control. The Odds Gap scans every major US sportsbook plus the federally regulated prediction markets and flags where the best price sits on each side of this MLB matchup.
How to read these Seattle Mariners vs Boston Red Sox odds
The cards above show the best moneyline price on each side and which book has it. The spread line shows Boston Red Sox at the market's consensus number, priced at the best odds among books quoting it. The total shows the Over at the consensus number. For every book's price on every market, open the game in the Line Shop.
What the Price Gap Is Worth
Across the 20 books quoting this side, the best price is +155 at Hard Rock Bet and the worst is +128 at Bally Bet. Same bet, same outcome, $27.00 difference in profit on a $100 stake. Nothing about the wager changes, only where you place it.
- Seattle Mariners: best +155 (Hard Rock Bet), worst +128 (Bally Bet)
- Boston Red Sox: best -150 (Novig), worst -175 (BetMGM)
Where Pinnacle's Line Opened
This game was listed before Pinnacle priced it, so this is Pinnacle's earliest price on it rather than the first number anyone posted. It is stamped with its own time, it was actually posted, and the market may already have moved before it existed.
- Boston Red Sox: PINN open -158, now -150 (8 cents longer)
- Seattle Mariners: PINN open +142, now +155 (13 cents longer)
The charts above plot every scan since, so you can see whether the move came in one step or drifted.
Seattle Mariners vs Boston Red Sox Odds: Common Questions
Who has the best odds on Seattle Mariners vs Boston Red Sox?
At the latest scan Hard Rock Bet pays the most on Seattle Mariners at +155, and Novig pays the most on Boston Red Sox at -150. Those are two different books more often than not, and the best number moves as books reprice, so check the table on this page before you bet rather than assuming one book wins both sides.
How much does the price differ between sportsbooks on this game?
Right now 20 books price this side, and the spread between the best and worst of them is +155 at Hard Rock Bet versus +128 at Bally Bet. On a $100 bet that is $27.00 more in your pocket for the same wager, won or lost the same way. That difference is the entire reason this page exists.
Where did the Seattle Mariners vs Boston Red Sox line open?
Boston Red Sox opened -158 at Pinnacle and is -150 now. We capture the opener once from the historical archive rather than inferring it, so the number on this page is the price that was actually posted, and the movement charts above plot every scan since.
What is the spread and total for Seattle Mariners vs Boston Red Sox?
The consensus spread is -1.5 on Boston Red Sox with the best juice at +136 (FanDuel), and the consensus total is 8 with the best Over price at +101 (Pinnacle). Consensus means the line most books agree on; the flagged price is the best juice available at that same number.
How often do these MLB odds update?
The free board rescans every hour from 7am to 9pm ET; Live Beta, free with an email signup during the beta, refreshes every minute. This page was last scanned August 31, 5:35 AM ET, and that timestamp is shown above the table.
Does The Odds Gap pick a side on Seattle Mariners vs Boston Red Sox?
No. There is no model, no projection, and no lean anywhere on this site. We show which book pays the most on a bet you have already decided to make. Math, not picks.
The Rest Of This MLB Slate
- San Francisco Giants vs Atlanta Braves odds · Mon Aug 31, 6:05 PM ET
- New York Mets vs Tampa Bay Rays odds · Mon Aug 31, 6:41 PM ET
- San Diego Padres vs Cincinnati Reds odds · Mon Aug 31, 6:41 PM ET
- Miami Marlins vs Washington Nationals odds · Mon Aug 31, 6:46 PM ET
- Milwaukee Brewers vs Chicago Cubs odds · Mon Aug 31, 7:41 PM ET
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