Mariners vs. Giants Betting Lines, Odds, & Player Matchups July 18, 2026

Data Skrive

The Seattle Mariners (48-49) and the San Francisco Giants (41-55) square off on Saturday to start a three-game series, with the first pitch at 8:08 p.m. ET at T-Mobile Park. Bryan Woo starts for Seattle while San Francisco will counter with Logan Webb.

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Betting Odds

Mariners to win vs Giants -136

Bet $20, Payout $34.71

Mariners vs. Giants betting lines

  • Favorite: Mariners (-136)
  • Underdog: Giants (+111)
  • Over/under: 7

Mariners betting info, hitting leaders, & pitching

Mariners betting info

  • The Mariners have compiled a 44-38 record in games they were listed as the moneyline favorite (winning 53.7% of those games).
  • When it has played as moneyline favorites with odds of -136 or shorter, Seattle has a record of 28-16 (63.6%).
  • The implied moneyline probablility in this matchup gives the Mariners a 57.6% chance to win.
  • Seattle has played in 97 games with an over/under set, and have combined with its opponents to go over the total 47 times (47-46-4).
  • The Mariners have a 38-59-0 record against the spread this season.

Mariners hitting info

  • Randy Arozarena paces the Mariners in runs batted in (45) and has put up a team-best batting average of .286.
  • Arozarena’s home runs rank 94th in MLB and he ranks 71st in RBI in MLB.
  • Arozarena heads into this game on a four-game hitting streak. In his last five games he is batting .222 with two home runs, four walks and four RBIs.
  • Josh Naylor is batting .252 with 12 doubles, eight home runs and 30 walks.
  • Among all MLB batters, Naylor ranks 151st in homers and 127th in RBI.
  • Naylor has hit safely in eight straight games. During his last 10 outings he is batting .211 with a double, three walks and two RBIs.
  • Cole Young is batting .253 with 14 doubles, a triple, 11 home runs and 25 walks.
  • Young brings a three-game hitting streak into this game. During his last five outings he is hitting .167 with a double, a home run, a walk and an RBI.
  • Dominic Canzone’s 15 home runs pace his team.

Mariners pitching rankings

  • The Mariners pitching staff is 11th in MLB with a collective 8.7 strikeouts per nine innings.
  • Seattle has the sixth-ranked team ERA among all MLB pitching staffs (3.62).
  • The Mariners have the third-lowest WHIP in MLB (1.184).
  • The Mariners surrender the fewest home runs in baseball (90 total, 0.9 per game).
  • In its 8-2 win last time out, Seattle struck out eight Rays batters while allowing four hits.

Giants betting info, hitting leaders, & pitching

Giants betting info

  • This season, the Giants have won 22 out of the 57 games, or 38.6%, in which they’ve been the underdog.
  • San Francisco has entered 30 games this season as the underdog by +111 or more and is 15-15 in those contests.
  • The moneyline for this contest implies a 47.4% chance of a victory for the Giants.
  • San Francisco’s games have gone over the total in 45 of its 95 chances.
  • The Giants are 43-52-0 against the spread in their 95 chances this season.

Giants hitting info

  • Luis Arraez leads San Francisco in batting average (.330) this season while adding four home runs and 35 RBI.
  • Among all hitters in the big leagues, Arraez ranks 264th in homers and 134th in RBI.
  • Casey Schmitt is slugging .497 this season, with a team-best 19 homers while driving in 50 runs.
  • Schmitt ranks 26th in home runs and 50th in RBI among all batters in the major leagues.
  • Schmitt enters this game on a four-game hitting streak. During his last five outings he is batting .300 with a double, two home runs, two walks and five RBIs.
  • Jung Hoo Lee has 100 hits this season and a slash line of .302/.333/.429.
  • Rafael Devers leads San Francisco in home runs with 19 and runs batted in with 52.

Giants pitching rankings

  • The Giants average just 8.7 strikeouts per nine innings as a pitching staff, which ranks 26th in the majors.
  • San Francisco has pitched to a 4.47 ERA this season, which ranks 22nd in baseball.
  • The Giants rank 22nd in MLB with a combined 1.371 WHIP this season.
  • The Giants have allowed the seventh-fewest home runs this season at just 98, or 1.0 per game.
  • San Francisco earned a 3-1 win in its most recent game, striking out six Rockies batters while allowing four hits.
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Ryan Knuppel

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About Ryan Knuppel

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Betting Guide

How Money Line Works?

Moneyline betting is by far the easiest way to place a sports wager. There are no point spreads to parse, no garbage-time free throws to ruin your betting day, and no last-minute meaningless touchdowns to take you from a winner to a loser.

How to Bet Odds

When we, as sports fans, learned our multiplication tables, we aced the number 7. Seven, 14, 21, 28, 35, 42 were easy because we all watched football on the weekends. Multiplication by sevens, then add a three, a six after a missed PAT.

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If you are a golfer or have ever played on a bowling team, think of a point spread like a handicap. It is a way for two teams of differing abilities to play each other on equal footing.  The better team, and the favorite in the game, gives a certain amount …