Mariners vs White Sox Prediction, Odds, Moneyline, Spread & Over/Under for May 18

Odds updated as of 5:11 a.m.

In MLB action on Monday, the Seattle Mariners take on the Chicago White Sox.

Before you do any MLB betting on this matchup at FanDuel Sportsbook, here's what you need to know.

Mariners vs White Sox Game Info

• Seattle Mariners (22-26) vs. Chicago White Sox (24-22)
• Date: Monday, May 18, 2026
• Time: 9:40 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: Mariners.TV and CHSN

Mariners vs White Sox Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-174) | CHW: (+146)
• Spread: SEA: -1.5 (+126) | CHW: +1.5 (-152)
• Total: 7.5 -- Over: (+102) | Under: (-124)

Mariners vs White Sox Probable Starting Pitchers

Probable Pitchers: Bryan Woo (Mariners) - 3-2, 3.91 ERA vs Noah Schultz (White Sox) - 2-2, 4.91 ERA

This contest's pitching matchup is set, as the Mariners will send Bryan Woo (3-2) to the mound, while Noah Schultz (2-2) will take the ball for the White Sox. Woo's team is 5-4-0 against the spread this season in his starts. Woo's team has been victorious in 55.6% of the games he's started as the moneyline favorite with a record of 5-4. The White Sox have a 3-3-0 record against the spread in Schultz's starts. The White Sox have a 3-1 record in Schultz's four starts this season when they were the moneyline underdog.

Mariners vs White Sox Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (68.4%)

Mariners vs White Sox Moneyline

• The Mariners vs White Sox moneyline has Seattle as a -174 favorite, while Chicago is a +146 underdog on the road.

Mariners vs White Sox Spread

• The Mariners are 1.5-run home favorites on the runline against the White Sox. The Mariners are +126 to cover, and the White Sox are -152.

Mariners vs White Sox Over/Under

• A total of 7.5 runs has been set for the Mariners-White Sox contest on May 18, with the over available at +102 and the under at -124.

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Mariners vs White Sox Betting Trends

• The Mariners have won in 21, or 47.7%, of the 44 contests they have been named as odds-on favorites in this year.
• This season Seattle has come away with a win five times in seven chances when named as a favorite of at least -174 on the moneyline.
• The Mariners and their opponents have gone over in 22 of their 48 games with a total set by sportsbooks this season.
• The Mariners have posted a record of 17-31-0 against the spread this season.
• The White Sox have won 51.3% of the games this season they were the underdog on the moneyline (20-19).
• Chicago is 3-4 (winning 42.9% of its games) when playing as a moneyline underdog of +146 or longer.
• The White Sox have played in 44 games with a set over/under, and have combined with opponents to go over the total 25 times (25-19-0).
• The White Sox are 26-18-0 ATS this season.

Mariners Player Leaders

• Randy Arozarena has 52 hits and an OBP of .386 to go with a slugging percentage of .445. All three of those stats rank first among Seattle hitters this season. He has a .301 batting average, as well.
• Among qualifying hitters in the majors, his batting average ranks 13th, his on-base percentage ranks 17th, and he is 60th in slugging.
• Josh Naylor is batting .249 with five doubles, five home runs and 17 walks, while slugging .362 with an on-base percentage of .316.
• He ranks 92nd in batting average, 109th in on-base percentage and 130th in slugging among qualified batters.
• Julio Rodriguez has 48 hits this season and has a slash line of .251/.319/.408.
• J.P. Crawford has been key for Seattle with 30 hits, an OBP of .363 plus a slugging percentage of .374.

White Sox Player Leaders

• Miguel Vargas has an on-base percentage of .374, a team-high for the White Sox. He's batting .247 and slugging .506.
• He is 95th in batting average, 29th in on-base percentage and 26th in slugging percentage among all qualifying hitters in the big leagues.
• Vargas brings a nine-game hitting streak into this game. In his last 10 games he is batting .333 with three doubles, four home runs, four walks and 11 RBIs.
• Munetaka Murakami has collected 38 hits to lead his team. He has a batting average of .235 while slugging .562 with an on-base percentage of .372.
• His batting average ranks 114th among all qualified players, his on-base percentage is 32nd, and he is 10th in slugging.
• Colson Montgomery is hitting .238 with eight doubles, 13 home runs and 17 walks.
• Chase Meidroth paces his team with a .372 slugging percentage.

Mariners vs White Sox Head to Head

• 5/10/2026: 2-1 CHW (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 5/9/2026: 6-1 CHW (Favorite: Mariners, Spread: -1.5, Total: 9.5, Favorite Moneyline: -134, Underdog Moneyline: +114)
• 5/8/2026: 12-8 SEA (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -142, Underdog Moneyline: +120)
• 8/7/2025: 4-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -295, Underdog Moneyline: +240)
• 8/6/2025: 8-6 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -270, Underdog Moneyline: +220)
• 8/5/2025: 8-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -250, Underdog Moneyline: +205)
• 5/21/2025: 6-5 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -146, Underdog Moneyline: +124)
• 5/19/2025: 5-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -188, Underdog Moneyline: +158)
• 7/28/2024: 6-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -130, Underdog Moneyline: +110)
• 7/27/2024: 6-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -154, Underdog Moneyline: +130)

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