It’s Monday, June 9, and the Mariners (33-31) are in Phoenix to take on the Diamondbacks (31-34). Emerson Hancock is slated to take the mound for Seattle against Merrill Kelly for Arizona.
The Diamondbacks were swept by the Reds after a 4-2 loss yesterday. They are now fourth in the NL West, 7.5 games out of first place, and have lost six of their last 10 games.
Despite picking up a win yesterday, the Mariners have not played much better. They have lost seven of their last 10 games.
Let’s dive into the matchup and find a sweat or two.
We’ve got all the info and analysis you need to know ahead of the game, including the latest info on the how to catch tipoff, odds, recent team performance, player stats, and of course, our predictions, picks & best bets for the game from our modeling tools and staff of experts.
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Game details & how to watch Mariners at Diamondbacks
- Date: Monday, June 9, 2025
- Time: 9:40PM EST
- Site: Chase Field
- City: Phoenix, AZ
- Network/Streaming: Dbacks.TV, ROOTNW, FS1
Never miss a second of the action and stay up-to-date with all the latest team stats and player news. Check out our day-by-day MLB schedule page, along with detailed matchup pages that update live in-game with every out.
Odds for the Mariners at the Diamondbacks
The latest odds as of Monday:
- Moneyline: Mariners (+140), Diamondbacks (-166)
- Spread: Diamondbacks -1.5
- Total: 9.0 runs
Probable starting pitchers for Mariners at Diamondbacks
- Pitching matchup for June 9, 2025: Emerson Hancock vs. Merrill Kelly
- Mariners: Emerson Hancock, (2-2, 5.19 ERA)
Last outing (Baltimore Orioles, 6/4): 5.2 Innings Pitched, 1 Earned Runs Allowed, 2 Hits Allowed, 2 Walks, and 6 Strikeouts - Diamondbacks: Merrill Kelly, (6-2, 3.43 ERA)
Last outing (Atlanta Braves, 6/4): 7.0 Innings Pitched, 0 Earned Runs Allowed, 1 Hits Allowed, 1 Walks, and 8 Strikeouts
- Mariners: Emerson Hancock, (2-2, 5.19 ERA)
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Top betting trends & insights to know ahead of Mariners at Diamondbacks
- The Mariners have lost four of their last five games
- The over was 5-2 (71%) in the Diamondbacks’ home games with Merrill Kelly on the mound last season
- It has been 11 games since the Mariners last covered the -1.5 run line
If you’re looking for more key trends and stats around the spread, moneyline and total for every single game on the schedule today, check out our MLB Top Trends tool on NBC Sports!
Expert picks & predictions for tonight’s game between the Mariners and the Diamondbacks
Rotoworld Best Bet
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Our model calculates projections around each moneyline, spread and over/under bet for every game on the MLB calendar based on data points like past performance, player matchups, ballpark information and weather forecasts.
Once the model is finished running, we put its projection next to the latest betting lines for the game to arrive at a relative confidence level for each wager.
Here are the best bets our model is projecting for Monday’s game between the Mariners and the Diamondbacks:
- Moneyline: NBC Sports Bet is recommending a play on the Arizona Diamondbacks on the Moneyline.
- Spread: NBC Sports Bet is leaning towards a play ATS on the Seattle Mariners at +1.5.
- Total: NBC Sports Bet is staying away from a play on the Game Total of 9.0.
Want even more MLB best bets and predictions from our expert staff & tools? Check out the Expert MLB Predictions page from NBC
Follow our experts on socials to keep up with all the latest content from the staff:
- Jay Croucher (@croucherJD)
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- Vaughn Dalzell (@VmoneySports)
- Brad Thomas (@MrBradThomas)
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