The Seattle Mariners host the San Francisco Giants on July 17, 2026. First pitch from T-Mobile Park is scheduled for 10:10 p.m. EDT. The game will be broadcast on NBCS-BA.
The Mariners are favored by -184 on the moneyline and by -1.5 on the run line. The Giants are +154 on the moneyline and +1.5 on the run line. The total is set at 7 runs.
Find my MLB picks and Giants vs Mariners prediction below, as well as probable pitchers, weather report, and more.
Giants vs Mariners Prediction
- Giants vs Mariners Pick: Giants ML (+154 or Better)
My Giants vs Mariners best bet is the Giants moneyline. Make sure to find the best odds by checking our live MLB odds page.
Giants vs Mariners Odds
| Giants Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
+1.5 -156 | 7 -122o / -100u | +154 |
| Mariners Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
-1.5 +130 | 7 -122o / -100u | -184 |
- Giants vs Mariners moneyline: Giants +154, Mariners -184
- Giants vs Mariners over/under: 7 (-122o / -100u)
- Giants vs Mariners spread: +1.5 (-156), – 1.5 (+130)
Giants vs Mariners Polymarket MLB Odds
Giants vs Mariners Probable Pitchers
| Landen Roupp (RHP) | Stat | Bryce Miller (RHP) |
|---|---|---|
| 6-8 | W-L | 4-3 |
| 2-1 | fWAR (FanGraphs) | 1.3 |
| 4.27/3.36 | ERA / xERA | 2.18/2.27 |
| 3.28/3/67 | FIP / xFIP | 3.12/3.01 |
| 15.1 | K-BB% | 26 |
| 48.6 | GB% | 39.6 |
| .306 | BABIP | .233 |
| 99 | Stuff+ | 109 |
| 107 | Location+ | 112 |
Giants vs Mariners MLB Betting Preview
San Francisco Giants Betting Preview
The Giants will get the second half started in Seattle on Friday, hoping to win a fourth game in five tries. Their starting pitcher, Landon Roupp, will also be looking to build a streak of his own after earning the win in his first-half finale over the Blue Jays.
It was Roupp's first win since the month of April, and looking at the results you can see why. the right-hander owned a 7.14 ERA in June and a 4.38 in May, tossing in some landmines amidst some stretches of excellence. On the year he owns a .226 Expected Batting Average and 3.36 Expected ERA, numbers that shine despite Roupp's poor 10.2% walk rate.
Roupp operates primarily as a ground-ball pitcher, yet has found success in the strikeout department with a 25.3% K%. The walks have been what's done him in this year; he hasn't had any particular issues with home runs and has rarely given up a barrage of hits. He'll look to an infield which ranked 13th in Outs Above Average during the first half for a helping hand.
His teammates may also give him a boost at the plate here. San Francisco ranks ninth in wRC+ for the month of July, hitting .265 with an improved 10.6% strikeout rate, and its .175 Isolated Power is acceptable. The Giants also rank fourth in xBA versus splitters from righties, and are fine — 13th, to be exact — against four-seamers. That'll come into play against Seattle's probable pitcher.
Seattle Mariners Betting Preview
Seattle will counter with Bryce Miller in this one, a man who's wowed the many fans of predictive metrics in today's game.
Though it's been just nine starts, folks are already anointing the 27-year-old Miller after three mediocre — if not bad — seasons. He's looked sharp with a 2.19 ERA through 52 2/3 innings, allowing a low 28.4% hard-hit rate and sporting a wonderful 30.2% strikeout rate to go along with a very low 4.2% walk rate.
Miller's been dynamite in just about every category, but it's important for us to take this with a grain of salt. After all, the righty is a fly-ball pitcher, and in Seattle that tends to work out. At home, he owns a 0.40 ERA through 22 2/3 innings, and on the road he is at 3.34 through 356 frames. He's surrendered seven homers in six road games compared to just one at T-Mobile Park. His 1.11 WHIP on the road is also 71 points higher than what it is at home.
Now, I'm no idiot — this game will be played in Seattle. I'm simply pointing out that he's benefited greatly from the conditions, and I'd also like to mention that his opponents in Seattle were the White Sox, Diamondbacks, Red Sox and Angels. He hasn't really been tested at all, and now he'll have to step to a Giants team which ranks first in OPS versus fly-ballers.
We'll quickly mention the Mariners' offense here, too, considering they're running an 83 wRC+ in July, powered by a very high 25.3% strikeout rate and a weak .142 ISO. They also rank nine spots lower, in 23rd place, versus ground-ball pitchers by OPS.
Giants vs Mariners Pick, Betting Analysis
Miller's been an unstoppable force thus far in 2026, but he's made just 10 appearances. His opponents at home have been weak, and even with some great home/road splits over his career he was equally as bad in Seattle last season as he was away from T-Mobile Park. It's not unheard of for him to give up runs at home, and the Giants may be the team to get to him.
San Francisco's league-leading .837 OPS versus fly-ball pitchers, coupled with excellent numbers against the fastball and splitter — which they'll see plenty of from Miller — should keep its hot streak going here. Roupp hasn't been lights-out, but he's pitched a bit better than his results would indicate and will draw an offense which has featured very little power. I'm going to roll the dice with the road dogs.
Pick: Giants ML (+154 or Better)
