Seattle Mariners vs Milwaukee Brewers Picks and Prediction for Tuesday August 18, 2026

The Seattle Mariners visit the Milwaukee Brewers on Tuesday night at American Family Field in Milwaukee, Wisconsin. First pitch is scheduled for 7:40 p.m. ET on August 18, with MLB.TV providing coverage. Seattle enters at 59-66 overall and 26-37 on the road, while Milwaukee owns one of the strongest records in baseball at 77-48 and is 41-22 at home. The Mariners have won three of their last five games, while the Brewers are also 3-2 during that stretch and have won two straight. ESPN's matchup predictor gives Milwaukee a 68.8% chance of winning compared with 31.2% for Seattle. At the time of this writing the odds were not released. Check out our free MLB picks for more baseball predictions and betting analysis.

Starting Pitchers

Bryce Miller gets the start for Seattle with a 4-6 record, 3.39 ERA, and impressive 0.99 WHIP through 85 innings. The right-hander has allowed 68 hits and 14 home runs while recording 84 strikeouts against only 16 walks. Milwaukee counters with Kyle Harrison, who enters at 9-3 with a 3.47 ERA and 1.13 WHIP through 93.1 innings. The left-hander has allowed 81 hits and 13 home runs while striking out 114 and walking 24. Miller owns slight advantages in ERA and WHIP, while Harrison has generated considerably more strikeouts.

Seattle Needs Its Pitching to Travel

Seattle enters Tuesday at 59-66 overall and has struggled away from home with a 26-37 road record. The Mariners have won three of their last five games and each of their last two, earning road victories by scores of 10-5 and 3-2. Their recent stretch has been inconsistent offensively, ranging from a 10-run performance to a 1-0 victory.

The Mariners are batting .230 this season with 489 runs, 951 hits, and 145 home runs. Seattle owns a .309 on-base percentage and .378 slugging percentage. The pitching staff has been considerably stronger, producing a 3.85 ERA and 1.21 WHIP while opposing hitters are batting .244.

Seattle's power is its primary offensive advantage, with 145 home runs compared with Milwaukee's 113. However, the Mariners have scored 119 fewer runs despite that power advantage. Seattle will likely need its pitching staff to keep this game close because Milwaukee has been considerably better at consistently creating and converting scoring opportunities.

Milwaukee Continues to Set the Pace

Milwaukee enters Tuesday at 77-48 overall and has been excellent at American Family Field with a 41-22 home record. The Brewers have won three of their last five and two consecutive games, with their latest victories coming by scores of 4-1 and 6-2. Both wins came on the road against a strong opponent before Milwaukee returned home for this series.

The Brewers are batting .250 with 608 runs, 1,055 hits, and 113 home runs. Milwaukee owns an excellent .335 on-base percentage and a .392 slugging percentage. Its pitching staff has also performed well, posting a 3.50 ERA and 1.16 WHIP while limiting opponents to a .219 batting average.

Milwaukee's balance is the biggest difference between these teams. The Brewers have scored significantly more runs while also holding advantages in batting average, on-base percentage, slugging percentage, team ERA, WHIP, and opponent batting average. Seattle's home-run advantage is notable, but Milwaukee's ability to consistently reach base and prevent runs gives the Brewers the stronger overall profile.

Seattle Mariners vs Milwaukee Brewers Picks and Prediction

Pick: Milwaukee Brewers Moneyline

Milwaukee is the moneyline selection. Seattle has a competitive starting pitching matchup, but the Brewers hold substantial advantages almost everywhere else. Milwaukee is 41-22 at home compared with Seattle's 26-37 road record, while the Brewers have scored 119 more runs and own the better team ERA and WHIP. Seattle's starter gives the Mariners a chance to stay close early, but Milwaukee's superior season-long performance makes the Brewers the preferred side.

Pick: Under 8.5

Take the under if the total is set at 8.5. Both scheduled starters enter with ERAs below 3.50, and Seattle's starter owns a 0.99 WHIP while Milwaukee's sits at 1.13. The Brewers also carry a 3.50 team ERA and have held opponents to a .219 batting average. Seattle has scored only 489 runs this season, creating another reason to expect a relatively controlled scoring environment. Under 8.5 is the preferred total.

Disclaimer: This preview was completed before play on Monday.