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

Odds updated as of 7:11 p.m.

MLB action on Tuesday includes the Seattle Mariners facing the Chicago White Sox.

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

Mariners vs White Sox Game Info

• Seattle Mariners (27-19) vs. Chicago White Sox (14-34)
• Date: Tuesday, May 20, 2025
• Time: 7:40 p.m. ET
• Venue: Rate Field -- Chicago, Illinois
• Coverage: CHSN and ROOT Sports NW

Mariners vs White Sox Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-180) | CHW: (+152)
• Spread: SEA: -1.5 (-110) | CHW: +1.5 (-111)
• Total: 8.5 -- Over: (-106) | Under: (-114)

Mariners vs White Sox Probable Starting Pitchers

Probable Pitchers: Casey Legumina (Mariners) - 3-1, 1.84 ERA vs Adrian Houser (White Sox) - 0-0, 0.00 ERA

This contest's pitching matchup is set, as the Mariners will send Casey Legumina (3-1) to the mound, while Adrian Houser will answer the bell for the White Sox. Legumina did not pitch in a game with a spread last season. Legumina did not pitch as the moneyline favorite in any games last season. Last season Houser and his team had a 4-3-0 record against the spread when he pitched. Houser and his team dropped each of the four games he pitched a season ago when they were moneyline underdogs.

Mariners vs White Sox Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (62.3%)

Mariners vs White Sox Moneyline

• Chicago is the underdog, +152 on the moneyline, while Seattle is a -180 favorite despite being on the road.

Mariners vs White Sox Spread

• The Mariners are at the White Sox and are favored by 1.5 runs (-110 to cover) on the runline. Chicago is -111 to cover.

Mariners vs White Sox Over/Under

• A total of 8.5 runs has been set for the Mariners-White Sox game on May 20, with the over available at -106 and the under at -114.

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

Mariners vs White Sox Betting Trends

• The Mariners have won in 16, or 59.3%, of the 27 contests they have been named as odds-on favorites in this year.
• This season Seattle has been victorious four times in six chances when named as a favorite of at least -180 on the moneyline.
• The Mariners and their opponents have gone over in 25 of their 46 games with a total set by sportsbooks this season.
• The Mariners are 24-22-0 against the spread in their 46 games that had a posted line this season.
• The White Sox have been the underdog on the moneyline 46 total times this season. They've finished 13-33 in those games.
• Chicago has a record of 6-24 when playing as a moneyline underdog with odds of +152 or longer (20%).
• The White Sox have had an over/under set by oddsmakers 47 times, and have combined with opponents to go over the total in 21 of those games (21-23-3).
• The White Sox have collected a 23-24-0 record ATS this season (covering 48.9% of the time).

Mariners Player Leaders

• Cal Raleigh has 40 hits, which ranks first among Seattle hitters this season, while batting .241 with 23 extra-base hits. He has an on-base percentage of .362 and a slugging percentage of .560.
• Among all qualifying hitters in the majors, he is 101st in batting average, 47th in on-base percentage, and 11th in slugging.
• Julio Rodriguez has an OPS of .724, fueled by an OBP of .313 and a team-best slugging percentage of .412 this season. He's batting .235.
• He is 115th in batting average, 105th in on-base percentage and 88th in slugging in the majors.
• Rodriguez brings a seven-game streak with at least one hit into this matchup. During his last 10 games he is hitting .262 with a double, two home runs and eight RBIs.
• Jorge Polanco has 37 hits this season and has a slash line of .314/.359/.619.
• Randy Arozarena has six home runs, 21 RBI and a batting average of .236 this season.

White Sox Player Leaders

• Miguel Vargas has accumulated a team-high OBP (.321), while leading the White Sox in hits (39). He's batting .239 and slugging.
• Including all the qualifying hitters in MLB, his batting average places him 109th, his on-base percentage ranks 95th, and he is 91st in slugging.
• Luis Robert has four doubles, five home runs and 21 walks while hitting .186. He's slugging .308 with an on-base percentage of .281.
• He is 159th in batting average, 137th in on-base percentage and 156th in slugging percentage in the majors.
• Chase Meidroth is hitting .286 with three doubles, a home run and 12 walks.
• Lenyn Sosa's .368 slugging percentage leads his team.

Mariners vs White Sox Head to Head

• 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)
• 7/26/2024: 10-0 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -174, Underdog Moneyline: +146)
• 6/13/2024: 3-2 CHW (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 6/12/2024: 2-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -260, Underdog Moneyline: +215)
• 6/11/2024: 4-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -184, Underdog Moneyline: +154)
• 6/10/2024: 8-4 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -215, Underdog Moneyline: +180)
• 8/23/2023: 5-4 CHW (Favorite: Mariners, Spread: -1.5, Total: 9.5, Favorite Moneyline: -240, Underdog Moneyline: +198)
• 8/22/2023: 6-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -154, Underdog Moneyline: +130)

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