Seattle Mariners vs Miami Marlins Prediction, Preview and Odds - 07/09/2026

Game Time: 6:40 pm ET, Thursday, July 9, 2026

Venue:  LoanDepot Park, Miami, FL 

Where to Watch:  MLB TV

DraftKings:  Moneyline odds:  Mariners -149, Marlins +123; Over/Under:  8 runs

Bet365:  Moneyline odds:  Mariners -150, Marlins +125; Over/Under:  8 runs

BetMGM:  Moneyline odds:  Mariners -150, Marlins +125; Over/Under:  8 runs

Seattle Mariners:  47-45 (1st place, AL West)

Miami Marlins:  50-42 (3rd place, NL East)

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Seattle Mariners:  6-4 last 10

Miami Marlins:  7-3 last 10

The Mariners are entering this series off a win and won their 3-game series against the Toronto Blue Jays 2-1 in their last series. They enter this game with a 47-45 record overall and have a road record of 20-25. This is the series finale of a 3-game series with the Marlins on Thursday with the 2nd game still to be played on Wednesday. The Mariners lost the series opener on Tuesday. Their offense ranks 24th in the MLB with a .694 OPS. George Kirby is their starting pitcher on Wednesday while Bryce Miller is making his start in this game on Thursday. He is 4-2 with a 1.71 ERA this season. His team lost 2 of their last 3 games this season with him making an appearance. In his last MLB regular season appearance, he allowed 0 ER, 0 HR, and 0 BB with 8 SO on 2 hits through 7 IP against the Los Angeles Angels.

The Marlins are entering this series off a win and completed the sweep in their 3-game series against the Athletics 3-0 in their last series. They enter this game with a 50-42 record overall and have a home record of 29-17. This is the 3rd game of a 3-game series with the Mariners on Thursday with the 2nd game of this series still to be played on Wednesday. The Marlins won the 1st game of this series on Tuesday. Their offense ranks 6th in the MLB with a .742 OPS. Tyler Phillips is their starting pitcher on Wednesday while Janson Junk is making his start in this game on Thursday. He is 3-5 with a 4.80 ERA this season. His team lost 2 of their last 3 games this season with him making an appearance. In his last MLB regular season start, he allowed 1 earned run, 0 homers, and 0 walks with 3 strikeouts on 8 hits through 5 innings pitched against the Toronto Blue Jays.

The current betting odds have the Mariners listed as a favorite in this game according to Draftkings Sportsbook. The Marlins have looked good in their games this season with their 50-42 record overall which has them right in the middle of the NL East. They have looked great in their own ballpark too with their 29-17 home record this season. Meanwhile, the Mariners have looked good in their games this season with their 47-45 record overall which has them right at the top of the AL West. They haven't been a great road team though with their 20-25 road record this year. The Marlins have been rolling lately with a really hot offense and they are now 7-3 in their last 10 games, but the Mariners are 6-4 in their last 10 games and have been getting hot again too. The Mariners almost took the 1st game of this series with a late comeback since the Marlins bullpen hasn't been that great, and the Mariners will be able to take advantage of this pitching matchup too. The Mariners are going with Miller in this one and he has looked great this season. He is 4-2 with a 1.71 ERA and he has been their best starter this season. The team has had some trouble lately, losing 2 of their last 3 games with him starting, but he is coming off another great start in which he gave up no runs and that has been a common theme for him all year. The Mariners have been getting better on offense lately too and the Marlins are going through some issues with their pitching at the moment, dealing with a ton of injuries. Look for the Mariners to take advantage of this pitching matchup with their best on the mound here. The best way to place a bet here is on the Mariners to win this game. 

Mariners Marlins Prediction:  Our MLB Pick for Thursday, July 9, 2026 (6:40 pm ET start time) is Mariners 4 Marlins 1.

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Seattle Mariners: 228-201 (-11.1 units) on the moneyline in all games. 98-115 (-28.2 units) on the moneyline in road games. 162-145 (-14.4 units) on the moneyline against right-handed starters. 26-14 OVER against NL East opponents.

Miami Marlins: 191-225 (+21.9 units) on the moneyline in all games. 60-65 (+12.8 units) on the moneyline in an inter-league game. 149-142 (+52.8 units) on the moneyline against right-handed starters. 22-14 OVER against AL West opponents.

Seattle Mariners:  J. Rodriguez (CF) Seven Day IL - Head. R. Refsnyder (DH) Ten Day IL - Knee. W. Wilson (3B) Sixty Day IL - Thumb. M. Brash (RP) Fifteen Day IL - Lat. C. Criswell (RP) Sixty Day IL - Shoulder. B. Donovan (3B) Ten Day IL - Groin. C. Vargas (RP) Sixty Day IL - Lat. L. Evans (SP) Sixty Day IL - Arm.

Miami Marlins:  A. Bender (RP) Fifteen Day IL - Shin. J. Ekness (RP) Sixty Day IL - Calf. A. Nardi (RP) Sixty Day IL - Ribs. J. Junk (SP) Fifteen Day IL - Shin. R. Snelling (SP) Sixty Day IL - Elbow. A. Mazur (SP) Sixty Day IL - Elbow. R. Henriquez (RP) Sixty Day IL - Elbow.

“Tough way to start the road trip. I thought our guys fought hard tonight. We started to crawl our way back, they kept fighting. We created some chances. We got some guys on base, put ourselves in some good positions. We were able to capitalize on some of them." - Dan Wilson after his team’s loss against the Marlins in their game on Tuesday. 

“You have a chance at home to cash one in and we were able to do it. These guys, no matter what, they don’t stop fighting and you can see the amount of confidence and belief they have in each other now.” - Clayton McCullough after his team’s win against the Mariners in their game on Tuesday.

J.P. Crawford (L) 3B

Randy Arozarena (R) LF

Dominic Canzone (L) DH

Cal Raleigh (S) C

Josh Naylor (L) 1B

Luke Raley (L) RF

Cole Young (L) 2B

Victor Robles (R) CF

Colt Emerson (L) SS

Liam Hicks (L) DH

Kyle Stowers (L) 1B

Otto Lopez (R) SS

Xavier Edwards (S) 2B

Griffin Conine (L) LF

Owen Caissie (L) RF

Jakob Marsee (L) CF

Joe Mack (L) C

Javier Sanoja (R) 3B

Batting Average:  Randy Arozarena (.290)

Hits:  Julio Rodríguez (89)

Home Runs:  Luke Raley (14)

RBI:  Cole Young (42)

Stolen Bases:  Randy Arozarena (19)

Wins:  George Kirby (7)

Saves:  Andrés Muñoz (16)

ERA:  Matt Brash (0.54)

Batting Average:  Otto Lopez (.343)

Hits:  Otto Lopez (124)

Home Runs:  Liam Hicks (13)

RBI:  Liam Hicks (56)

Stolen Bases:  Esteury Ruiz (19)

Wins:  Sandy Alcantara (10)

Saves:  Pete Fairbanks (12)

ERA:  William Kempner (0.00)

Managers:

Seattle Mariners: Dan Wilson (3rd season)

Miami Marlins: Clayton McCullough (2nd season)