Mariners vs Cubs Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 23

Odds updated as of 4:11 p.m.

The Chicago Cubs are among the MLB squads busy on Sunday, up against the Seattle Mariners.

Here's everything you need to know before checking out today's MLB odds and spreads on FanDuel Sportsbook.

Cubs vs Mariners Game Info

• Chicago Cubs (74-56) vs. Seattle Mariners (62-68)
• Date: Sunday, August 23, 2026
• Time: 4:10 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: Mariners.TV and MARQ

Cubs vs Mariners Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: CHC: (-120) | SEA: (+110)
• Spread: CHC: -1.5 (+134) | SEA: +1.5 (-162)
• Total: 7.5 -- Over: (-110) | Under: (-110)

Cubs vs Mariners Probable Starting Pitchers

Probable Pitchers: Shota Imanaga (Cubs) - 8-9, 3.77 ERA vs Bryce Miller (Mariners) - 4-7, 3.71 ERA

The probable pitchers are Shota Imanaga (8-9) for the Cubs and Bryce Miller (4-7) for the Mariners. Imanaga and his team are 10-14-0 ATS this season when he starts. Imanaga's team is 11-10 this season when he starts and they are the moneyline favorite. The Mariners have gone 1-13-0 ATS in Miller's 14 starts that had a set spread. The Mariners were the underdog on the moneyline for two Miller starts this season -- they lost both.

Cubs vs Mariners Moneyline

• Seattle is the underdog, +110 on the moneyline, while Chicago is a -120 favorite despite being on the road.

Cubs vs Mariners Spread

• The Mariners are hosting the Cubs, and are +1.5 on the runline. The Mariners are +134 to cover the spread, and the Cubs are -162.

Cubs vs Mariners Over/Under

• Cubs versus Mariners on Aug. 23 has an over/under of 7.5 runs, with the odds on the over -110 and the under set at -110.

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Cubs vs Mariners Betting Trends

• The Cubs have been victorious in 48, or 57.8%, of the 83 contests they have been chosen as favorites in this season.
• Chicago has a record of 40-31 when favored by -120 or more this year.
• The Cubs and their opponents have hit the over in 68 of their 125 games with a total set by oddsmakers this season.
• The Cubs are 61-64-0 against the spread in their 125 games that had a posted line this season.
• The Mariners have gone 9-17 in games they were the underdog on the moneyline (winning 34.6% of those games).
• Seattle has gone 5-8 in games it has played as a moneyline underdog with odds of +110 or longer (38.5%).
• The Mariners have combined with opponents to go over the total 65 times this season for a 65-58-6 record against the over/under.
• The Mariners have gone 47-82-0 against the spread this season.

Cubs Player Leaders

• Pete Crow-Armstrong has 138 hits and an OBP of .377 to go with a slugging percentage of .554. All three of those stats are best among Chicago hitters this season. He has a .279 batting average, as well.
• Among qualifying hitters, he ranks 26th in batting average, his on-base percentage ranks 11th, and he is second in slugging.
• Crow-Armstrong will look for his third straight game with a hit in this contest. In his last five games he is hitting .350 with two doubles, four home runs, four walks and five RBIs.
• Alex Bregman is batting .258 with 24 doubles, a triple, 19 home runs and 63 walks. He's slugging .423 with an on-base percentage of .347.
• Among qualified hitters, he is 68th in batting average, 50th in on-base percentage and 70th in slugging percentage.
• Bregman heads into this game looking to extend his two-game hit streak. During his last five outings he is batting .409 with a double, three home runs, a walk and six RBIs.
• Nico Hoerner is batting .263 with a .362 slugging percentage and 58 RBI this year.
• Hoerner takes a two-game hitting streak into this game. During his last five outings he is hitting .350 with a double and two RBIs.
• Seiya Suzuki is batting .267 with a .358 OBP and 74 RBI for Chicago this season.
• Suzuki takes a two-game hitting streak into this game. In his last five games he is batting .150 with a home run, three walks and an RBI.

Mariners Player Leaders

• Randy Arozarena has accumulated a team-high OBP (.369) and slugging percentage (.463), and leads the Mariners in hits (125, while batting .275).
• Including all the qualifying players in MLB, his batting average ranks 35th, his on-base percentage is 18th, and he is 40th in slugging.
• Josh Naylor's .367 slugging percentage paces his team. He has a batting average of .265 with an on-base percentage of .328.
• His batting average ranks 50th among all qualified players, his on-base percentage ranks 75th, and he is 119th in slugging.
• Cole Young has 15 doubles, three triples, 15 home runs and 34 walks while hitting .253.
• Julio Rodriguez has 18 doubles, 19 home runs and 40 walks while hitting .250.

Cubs vs Mariners Head to Head

• 8/22/2026: 5-4 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -114, Underdog Moneyline: +106)
• 8/21/2026: 6-5 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -108, Underdog Moneyline: +100)
• 6/22/2025: 14-6 SEA (Favorite: Mariners, Spread: -1.5, Total: 11.5, Favorite Moneyline: -130, Underdog Moneyline: +110)
• 6/21/2025: 10-7 CHC (Favorite: Cubs, Spread: -1.5, Total: 12.5, Favorite Moneyline: -166, Underdog Moneyline: +140)
• 6/20/2025: 9-4 SEA (Favorite: Cubs, Spread: -1.5, Total: 9.5, Favorite Moneyline: -144, Underdog Moneyline: +122)
• 4/14/2024: 3-2 CHC (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -142, Underdog Moneyline: +120)
• 4/13/2024: 4-1 CHC (Favorite: Cubs, Spread: -1.5, Total: 7.5, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 4/12/2024: 4-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -134, Underdog Moneyline: +114)
• 4/12/2023: 5-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 11, Favorite Moneyline: -112, Underdog Moneyline: -104)
• 4/11/2023: 14-9 CHC (Favorite: Cubs, Spread: -1.5, Total: 10.5, Favorite Moneyline: -120, Underdog Moneyline: +102)

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