Mariners vs White Sox Prediction, Odds, Moneyline, Spread & Over/Under for May 20

Odds updated as of 11:11 p.m.

The Wednesday slate in MLB includes a matchup between the Seattle Mariners and the Chicago White Sox.

Before checking out the MLB betting lines on FanDuel Sportsbook, we've got you covered, in terms of the vital info regarding this matchup.

Mariners vs White Sox Game Info

• Seattle Mariners (23-26) vs. Chicago White Sox (24-23)
• Date: Wednesday, May 20, 2026
• Time: 4:10 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: (-146) | CHW: (+124)
• Spread: SEA: -1.5 (+142) | CHW: +1.5 (-172)
• Total: 8 -- Over: (-102) | Under: (-120)

Mariners vs White Sox Probable Starting Pitchers

Probable Pitchers: Emerson Hancock (Mariners) - 3-2, 3.02 ERA vs Sean Burke (White Sox) - 2-3, 4.10 ERA

The probable pitchers are Emerson Hancock (3-2) for the Mariners and Sean Burke (2-3) for the White Sox. When Hancock starts, his team is 3-6-0 against the spread this season. Hancock's team has been victorious in 50% of the games he's started as the moneyline favorite with a record of 4-4. The White Sox have a 2-5-0 record against the spread in Burke's starts. The White Sox have been the underdog on the moneyline in seven of Burke's starts this season, and they went 2-5 in those games.

Mariners vs White Sox Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (60.8%)

Mariners vs White Sox Moneyline

• Seattle is a -146 favorite on the moneyline, while Chicago is a +124 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 +142 to cover, and the White Sox are -172.

Mariners vs White Sox Over/Under

• The over/under for the Mariners versus White Sox game on May 20 has been set at 8, with -102 odds on the over and -120 odds on the under.

Bet on Seattle Mariners vs. Chicago White Sox on FanDuel today!

Mariners vs White Sox Betting Trends

• The Mariners have been victorious in 22, or 48.9%, of the 45 contests they have been chosen as favorites in this season.
• This season Seattle has come away with a win 11 times in 19 chances when named as a favorite of at least -146 on the moneyline.
• The Mariners and their opponents have gone over in 22 of their 49 games with a total set by sportsbooks this season.
• The Mariners are 18-31-0 against the spread in their 49 games that had a posted line this season.
• The White Sox have been the underdog on the moneyline 40 total times this season. They've finished 20-20 in those games.
• Chicago is 7-12 (winning just 36.8% of its games) when playing as a moneyline underdog of +124 or longer.
• The White Sox have had an over/under set by bookmakers 45 times, and have combined with opponents to go over the total in 25 of those games (25-20-0).
• The White Sox have gone 26-19-0 against the spread this season.

Mariners Player Leaders

• Randy Arozarena has 54 hits and an OBP of .388 to go with a slugging percentage of .458. All three of those stats lead Seattle hitters this season. He has a .305 batting average, as well.
• Among qualifying hitters in the majors, he is 12th in batting average, 18th in on-base percentage, and 50th in slugging.
• Josh Naylor is hitting .260 with five doubles, five home runs and 17 walks, while slugging .370 with an on-base percentage of .325.
• Among all qualifying hitters, he ranks 71st in batting average, 96th in on-base percentage and 120th in slugging percentage.
• Julio Rodriguez is batting .251 with a .421 slugging percentage and 21 RBI this year.
• J.P. Crawford has six home runs, 16 RBI and a batting average of .211 this season.

White Sox Player Leaders

• Miguel Vargas is hitting .241 with seven doubles, a triple, 11 home runs and 30 walks. He's slugging .494 with an on-base percentage of .366.
• Including all the qualifying hitters in the big leagues, he is 102nd in batting average, 37th in on-base percentage and 31st in slugging percentage.
• Munetaka Murakami's 40 hits and .379 on-base percentage both pace his team. He has a batting average of .242 while slugging .564.
• He is currently 101st in batting average, 24th in on-base percentage and 10th in slugging percentage among all qualifying hitters.
• Colson Montgomery is batting .234 with eight doubles, 13 home runs and 18 walks.
• Chase Meidroth's .372 slugging percentage leads his team.

Mariners vs White Sox Head to Head

• 5/18/2026: 6-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -162, Underdog Moneyline: +136)
• 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)

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