San Francisco Giants (41-55) vs. Seattle Mariners (48-49) July 17, 2026 10:10 pm EDT The Line: Seattle Mariners -157 / San Francisco Giants 130; Over/Under: 7 (Get latest betting odds)
In this article, we will formulate a Giants vs Mariners Prediction for this MLB matchup on Friday, July 17 th in the opening game of this series. Let’s take a look at the prediction for this MLB matchup.
The Seattle Mariners have a 48-49 record this season and are sitting in the 2nd place of the AL West. They have a 27-20 home record and are coming off an 8-2 road win against the Rays. They will face the Reds and the Rangers next.
The Seattle Mariners have a .230 batting average this season, .310 OBP and .380 Slugging percentage. Seattle’s pitching staff has a 3.61 ERA and 1.18 WHIP. Randy Arozarena is the team’s best hitter with a .286 batting average and also leads the team in RBI with 45, while Dominic Canzone adds a team-high 15 home runs.
Bryce Miller (R) is the projected starting pitcher for the Seattle Mariners, and he has a 4-3 record, 2.18 ERA and 0.83 WHIP.
The San Francisco Giants have a 41-55 record this season and are sitting in the 4th place of the NL West. They have a 19-30 away record and are coming off a 3-1 home win against the Rockies. They will face the Royals and the Angels next.
The San Francisco Giants have a .256 batting average this season, .310 OBP and .420 Slugging percentage. San Francisco’s pitching staff has a 4.46 ERA and 1.37 WHIP. Luis Arraez is the team’s best hitter with a .330 batting average. Rafael Devers leads the team in RBI with 52, adding a team-high 19 home runs.
Landen Roupp (R) is the projected starting pitcher for the San Francisco Giants, and he has a 6-8 record, 4.27 ERA and 1.31 WHIP.
The Giants are 4-1 in their last 5 meetings against the Mariners but are 1-3 in their last 4 visits in Seattle.
In this Giants vs Mariners Prediction, the Mariners are coming as -160 home favorites. I like the Mariners in this spot with Bryce Miller on the mound, who has been the one of the best home pitchers in baseball with a 0.40 ERA across 22.7 innings pitched at home. On top of that, the Mariners have the 4 th -best bullpen in baseball and a better offense and I don’t trust Landen Roupp for the Giants, especially on the road, where he has a 4.67 ERA. Take the Mariners to win this one at home.