Seattle Mariners vs Milwaukee Brewers Prediction, Preview and Odds - 08/18/2026

Game Time: 7:40 pm ET, Tuesday, August 18, 2026

Venue:  American Family Field, Milwaukee, WI

Where to Watch:  MLB TV

DraftKings:  Moneyline odds:  Mariners +130, Brewers -157; Over/Under:  8 runs

Bet365:  Moneyline odds:  Mariners +130, Brewers -155; Over/Under:  8 runs

BetMGM:  Moneyline odds:  Mariners +135, Brewers -160; Over/Under:  8 runs

Seattle Mariners:  59-66 (3rd place, AL West)

Milwaukee Brewers:  77-48 (1st place, NL Central)

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Seattle Mariners:  3-7 last 10

Milwaukee Brewers:  5-5 last 10

The Mariners are entering this series off a win and won their 3-game series against the Houston Astros 2-1 in their last series. They enter this game with a 59-66 record overall and have a road record of 26-37. This is the series opener of a 3-game series with the Brewers on Tuesday and they have Monday off as a day of rest. Their offense ranks 27th in the MLB with a .687 OPS. Bryan Woo was their starting pitcher on Sunday while Bryce Miller is making his start in this game on Tuesday. He is 4-6 with a 3.39 ERA this season. His team lost their last 6 straight games this season with him making an appearance. In his last MLB regular season appearance, he allowed 5 ER, 1 HR, and 1 BB with 5 SO on 8 hits through 6 IP against the New York Yankees.

The Brewers are entering this series off a win and won their 4-game series against the Los Angeles Dodgers 3-1 in their last series. They enter this game with a 77-48 record overall and have a home record of 41-22. This is the 1st game of a 3-game series with the Mariners on Tuesday and they have Monday off as a day of rest. Their offense ranks 11th in the MLB with a .727 OPS. Logan Henderson was their starting pitcher on Sunday while Kyle Harrison is making his start in this game on Tuesday. He is 9-3 with a 3.47 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 8 earned runs, 3 homers, and 3 walks with 3 strikeouts on 10 hits through 4.2 innings pitched against the San Diego Padres.

The current betting odds have the Brewers listed as a favorite in this game according to Draftkings Sportsbook. The Brewers have looked great in their games this season with their 77-48 record overall which has them right at the top of the NL Central with the best record in MLB. They have looked great in their own ballpark too with their 41-22 home record this season. Meanwhile, the Mariners haven't looked good in their games this season with their 59-66 record overall which has them right in the middle of the AL West. They haven't been a good road team either with their 26-37 road record this year. The Mariners are coming off a series win over the Astros, but they are 3-7 in their last 10 games and have looked terrible lately, sliding down the standings in the playoff race. The Brewers are 5-5 in their last 10 games and haven't looked great lately either, but they did just win their 4-game series against the Dodgers and have some momentum on their side now. The Brewers are going with Harrison in this one and he has looked great this season too. He is 9-3 with a 3.47 ERA and he has been a stud for them all year. He has had some trouble lately, coming off a terrible start giving up 8 earned runs and the team has lost 2 of their last 3 games with him starting too, but that hasn't been a common theme for him this season and he will be looking to bounce back at home. The Mariners haven't looked nearly as good in road games this year either and they have one of the worst offenses in MLB. The Mariners are going with Miller in this one and he has looked great this season. He is 4-6 with a 3.39 ERA and hasn't been giving up many runs all season, but lately he has been falling apart. He is coming off a bad start in which he gave up 5 earned runs and the team hasn't had any success with him lately either, losing 6 games in a row now with him starting. Look for the Brewers to continue getting hot again after that series win against the Dodgers and take advantage of this pitching matchup at home where they have looked so good. The best way to place a bet here is on the Brewers to win this game. 

Mariners Brewers Prediction:  Our MLB Pick for Tuesday, August 18, 2026 (7:40 pm ET start time) is Brewers 4 Mariners 1.

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Seattle Mariners: 240-222 (-21.9 units) on the moneyline in all games. 104-127 (-32.7 units) on the moneyline in road games. 45-62 (-8.3 units) on the moneyline as an underdog of +100 to +150. 6-3 UNDER vs. NL teams allowing 4.0 or less runs/game on the season.

Milwaukee Brewers: 24-15 (+6.8 units) on the moneyline against AL West opponents. 271-191 (+50.8 units) on the moneyline in all games. 143-89 (+23.1 units) on the moneyline in home games. 6-3 UNDER against AL West opponents.

Seattle Mariners:  V. Robles (RF) Day To Day - Shoulder. C. Emerson (SS) Ten Day IL - Wrist. C. Sulser (RP) Fifteen Day IL - Oblique. L. Raley (RF) Ten Day IL - Elbow. J. Crawford (SS) Ten Day IL - Wrist. W. Wilson (3B) Sixty Day IL - Thumb. M. Brash (RP) Fifteen Day IL - Lat. C. Criswell (RP) Sixty Day IL - Shoulder. C. Vargas (RP) Sixty Day IL - Lat. L. Evans (SP) Sixty Day IL - Arm.

Milwaukee Brewers:  B. Turang (2B) Day To Day - Knee. A. Uribe (RP) Fifteen Day IL - Forearm. C. Pratt (SS) Ten Day IL - Hamstring. S. Frelick (RF) Ten Day IL - Shoulder. J. Romero (RP) Fifteen Day IL - Appendix. R. Zastryzny (RP) Sixty Day IL - Shoulder. B. Woodruff (SP) Sixty Day IL - Shoulder. J. Kuhnel (RP) Fifteen Day IL - Shoulder. Q. Priester (SP) Sixty Day IL - Wrist. B. Fitzpatrick (RP) Sixty Day IL - Elbow. A. Zerpa (RP) Sixty Day IL - Forearm.

“Great to see the smile coming around the bases there and a huge run.” - Dan Wilson after his team’s win against the Astros in their game on Sunday. 

“I didn’t want to lose Logan, I don’t care who it’s for. As long as he stays healthy, he’s going to pitch for a long time.” - Pat Murphy after his team’s win against the LA Dodgers in their game on Sunday. 

Brendan Donovan (L) 3B

Randy Arozarena (R) LF

Dominic Canzone (L) RF

Julio Rodríguez (R) CF

Josh Naylor (L) 1B

Cole Young (L) 2B

Cal Raleigh (S) C

Weston Wilson (R) DH

Brock Rodden (S) SS

William Contreras (R) DH

Luis Lara (S) CF

Jackson Chourio (R) LF

Jake Bauers (L) 1B

Andrew Vaughn (R) 3B

Gary Sánchez (R) C

Brandon Lockridge (R) RF

Joey Ortiz (R) SS

Jonathan Ornelas (R) 2B

Batting Average:  Brock Rodden (.300)

Hits:  Randy Arozarena (120)

Home Runs:  Dominic Canzone (19)

RBI:  Cole Young (56)

Stolen Bases:  Josh Naylor (24)

Wins:  Logan Gilbert (9)

Saves:  Andrés Muñoz (22)

ERA:  Matt Brash (0.54)

Batting Average:  Jihwan Bae (.500)

Hits:  Brice Turang (121)

Home Runs:  Jake Bauers (21)

RBI:  Brice Turang (76)

Stolen Bases:  David Hamilton (22)

Wins:  Aaron Ashby (13)

Saves:  Trevor Megill (22)

ERA:  Easton McGee (0.00)

Managers:

Seattle Mariners: Dan Wilson (3rd season)

Milwaukee Brewers: Pat Murphy (3rd season)