San Francisco Giants vs Seattle Mariners MLB Prediction and Pick, Today's MLB Betting Picks, 7-18-2026

San Francisco Giants vs Seattle Mariners MLB Prediction and Pick, 7-18-2026. Today’s MLB Betting Picks – Best available odds at YouWager.lv. Claim your signup bonus.

Our San Francisco Giants vs Seattle Mariners Pick: MARINERS

Seattle is the recommended pick because it owns the advantage in overall pitching and has one of the most effective starting pitchers in this matchup. Bryan Woo has been outstanding throughout his career, posting a 3.42 ERA, an elite 1.00 WHIP, and allowing just 7.2 hits per nine innings. The Mariners also rank sixth in Major League Baseball with a 3.61 team ERA and feature a pitching staff with a strong 3.53 FIP, highlighting their ability to consistently limit scoring opportunities. While Logan Webb is also an excellent starter for San Francisco, the Giants have struggled offensively, ranking 24th in runs scored, and their defense has been below average with the league’s 28th-ranked fielding percentage. If Seattle’s pitching continues to perform at its season-long level and Woo delivers another quality outing, the Mariners have the edge to secure the victory.

MATCHUP	Giants	Mariners
San Francisco Giants vs Seattle Mariners Moneyline	+132	-160
Where	T-Mobile Park in Seattle, WA
When	Saturday, July 18, 2026

San Francisco Giants vs Seattle Mariners MLB Prediction – 7-18-2026 – MLB Betting Picks

Here is our San Francisco Giants vs Seattle Mariners MLB Prediction for both teams:

Giants Preview

Together, the Giants have hit 106 balls out of the park and amassed 179 two-baggers. San Francisco has been rung up 743 times and taken a walk 240 times, for a slugging rate of.420. The San Francisco Giants are ranked 24th in MLB overall, scoring 4.1 runs per game. They have amassed 840 hits and 381 RBI this season, with a batting average of.256. With a team on-base percentage of.310, they have scored 395 runs.

The Giants have struck out 732 batters this season and have a team earned run average of 4.46, which ranks them 22nd in baseball. Giants pitchers have allowed 459 runs overall (20th in the league) and 98 home homers. This season, they have walked 361 opponents, and their overall FIP is 4.28. San Francisco has given up 420 earned runs and 797 base hits (8.5 per nine innings). Their pitching staff has a collective WHIP of 1.37, and their K/BB ratio is 2.03.

The Giants’ relief pitchers have entered 77 save opportunities and have a 61.3% save percentage. So far this season, they have made 19 saves and lost 12 of their 31 save chances. 33.8% of the 157 runners that the relief pitchers have inherited this season have crossed the plate. In addition to making 73 appearances in high-leverage situations, Giants pitchers have entered the game with players on base 104 times. Throughout the season, the Giants have sent 299 bullpen pitchers to the mound. With 46 holds this season, the relief relievers rank 21st in the league.

The Giants are ranked 21st in MLB after converting 69.5% of balls in play into outs over 7,620 innings on the field. This season, the San Francisco Giants have earned 2,540 putouts, 888 assists, and 65 mistakes. They have earned 88 double plays and are now ranked 28th in professional baseball with a fielding percentage of.981.

In his MLB career thus far, Webb has earned 1,074 punch outs while taking the hill for 1,162 frames. His career WHIP is 1.193, and his earned run average is 3.42 (442 earned runs allowed). With 276 free passes, he has allowed 1,110 hits (8.6 hits per nine innings). Despite facing 4,762 hitters in the major leagues, Webb (75-60 career record) has a FIP of 3.37.

Mariners Preview

So far this year, Seattle has batted in 378 runs and hit 115 long balls. They have scored 392 runs, had 121 two-baggers, and received a free base 325 times. So far this season, the Seattle Mariners have a club batting average of.230 and an on-base percentage of.310. The Mariners average 4.04 runs per game (28th in the league) and have a team SLG% of.380. They have 736 base knocks and have been called out on strikes 841 times, ranking them tenth in MLB.

So far this season, the Mariners have a team WHIP of 1.182 and a FIP of 3.53. With 771 total hits allowed, their pitching staff ranks 13th in the league. With a collective ERA of 3.61 (344 earned runs yielded), the Seattle pitching staff has allowed 376 runs this season. As of right now, their K/BB ratio is 8.70 (825 strikeouts versus 242 bases on balls). They yield 3.95 runs per nine innings (sixth in MLB) and have given up 90 long balls.

Out of 94 inherited base runners, Seattle relievers have an inherited scoring rate of 28.7%. In addition to 68 times with runners on, their bullpen pitchers have entered the game 100 times in high-leverage situations. The Mariners have earned 53 holds and 15 failed saves in 91 save opportunities. With a 59.5% save percentage and 287 bullpen pitchers used thus far this season, they are ranked 20th in MLB.

The Mariners have a defensive efficiency of 69.6% (19th in MLB) after 7,716 innings on the diamond. The Seattle Mariners have a fielding percentage of.986 (17th in professional baseball) and have turned 85 double plays. This season, the Mariners have recorded 2,572 putouts, 49 errors, and 788 assists.

In 499 innings pitched thus far in his MLB career, Woo has struck out 494 batters and allowed 400 base hits. With a 3.42 ERA and a 35-21 career record, Woo has given up 7.2 hits every nine innings. With a WHIP of 1.001 and a FIP of 3.4, he has permitted 190 ERs. In his professional baseball career, he has faced 1,998 batters and has a K/BB ratio of 4.94.

Today’s Betting Picks 7-18-2026

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San Francisco Giants vs Seattle Mariners MLB Prediction and Pick, 7-18-2026. MLB Betting Picks, by YouWagert.lv

San Francisco Giants vs Seattle Mariners MLB Prediction and Pick, Today’s MLB Betting Picks, 7-18-2026