Mariners vs Nationals Prediction, Odds, Moneyline, Spread & Over/Under for May 28

Odds updated as of 9:11 p.m.

The Seattle Mariners will face the Washington Nationals in MLB action on Wednesday.

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

Mariners vs Nationals Game Info

• Seattle Mariners (30-23) vs. Washington Nationals (24-30)
• Date: Wednesday, May 28, 2025
• Time: 9:40 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: ROOT Sports NW and MASN2

Mariners vs Nationals Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-215) | WSH: (+180)
• Spread: SEA: -1.5 (-104) | WSH: +1.5 (-115)
• Total: 7.5 -- Over: (-122) | Under: (-100)

Mariners vs Nationals Probable Starting Pitchers

Probable Pitchers: George Kirby (Mariners) - 0-1, 12.27 ERA vs Trevor Williams (Nationals) - 2-5, 6.39 ERA

The Mariners will call on George Kirby (0-1) against the Nationals and Trevor Williams (2-5). Kirby and his team failed to cover the spread in his only opportunity this season as a starter. Kirby's team lost his only start as a favorite this season. When Williams starts, the Nationals are 6-4-0 against the spread. The Nationals have a 4-6 record in Williams' 10 starts this season when they were the moneyline underdog.

Mariners vs Nationals Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (61.9%)

Mariners vs Nationals Moneyline

• Seattle is the favorite, -215 on the moneyline, while Washington is a +180 underdog on the road.

Mariners vs Nationals Spread

• The Mariners are 1.5-run home favorites on the runline against the Nationals. The Mariners are -104 to cover, and the Nationals are -115.

Mariners vs Nationals Over/Under

• The over/under for Mariners-Nationals on May 28 is 7.5. The over is -122, and the under is -100.

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Mariners vs Nationals Betting Trends

• The Mariners have been victorious in 18, or 56.2%, of the 32 contests they have been chosen as favorites in this season.
• Seattle has been listed as a favorite of -215 or more on two occasions this season and split those games.
• The Mariners and their opponents have gone over the total this season in 28 of their 52 opportunities.
• The Mariners are 26-26-0 against the spread in their 52 games with a line set by sportsbooks this season.
• The Nationals have gone 21-20 in games they were the underdog on the moneyline (winning 51.2% of those games).
• Washington has played as a moneyline underdog of +180 or longer in only one game this season, which it lost.
• The Nationals have played in 52 games with an over/under set, and have combined with opponents to go over the total 25 times (25-26-1).
• The Nationals have a 28-24-0 record ATS this season.

Mariners Player Leaders

• Cal Raleigh leads Seattle in total hits (50) this season while batting .258 with 29 extra-base hits. He has an on-base percentage of .372 and a slugging percentage of .603.
• Among all qualifying hitters, he is 77th in batting average, his on-base percentage ranks 27th, and he is fourth in slugging.
• Raleigh hopes to build on a two-game hitting streak in this matchup. In his last five games he is hitting .333 with three home runs, two walks and four RBIs.
• Julio Rodriguez has hit 10 homers this season while driving in 32 runs. He's batting .244 this season and slugging .432 with an on-base percentage of .318.
• Among all qualifying players, he ranks 109th in batting average, 104th in on-base percentage and 71st in slugging percentage.
• Rodriguez heads into this matchup looking to extend his two-game hit streak. During his last five outings he is hitting .348 with a double, two home runs, a walk and seven RBIs.
• Jorge Polanco has collected 37 base hits, an OBP of .336 and a slugging percentage of .557 this season.
• J.P. Crawford leads Seattle in OBP (.384) this season, fueled by 46 hits.

Nationals Player Leaders

• James Wood has put up an on-base percentage of .376, a slugging percentage of .551, and has 58 hits, all club-bests for the Nationals (while batting .283).
• Including all the qualifying hitters in MLB, his batting average ranks 34th, his on-base percentage is 24th, and he is 11th in slugging.
• Wood hopes to build on a three-game hitting streak in this matchup. During his last five outings he is batting .263 with two doubles, two home runs, two walks and seven RBIs.
• C.J. Abrams is hitting .287 with 10 doubles, two triples, eight home runs and 11 walks. He's slugging .518 with an on-base percentage of .344.
• Including all qualified players, he is 29th in batting average, 55th in on-base percentage and 21st in slugging percentage.
• Luis Garcia is batting .233 with 10 doubles, four home runs and 11 walks.
• Nathaniel Lowe is hitting .224 with nine doubles, eight home runs and 19 walks.

Mariners vs Nationals Head to Head

• 5/27/2025: 9-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -164, Underdog Moneyline: +138)
• 5/26/2024: 9-5 SEA (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -174, Underdog Moneyline: +146)
• 5/25/2024: 3-1 WSH (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -164, Underdog Moneyline: +138)
• 5/24/2024: 6-1 WSH (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -132, Underdog Moneyline: +112)
• 6/28/2023: 4-1 WSH (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -290, Underdog Moneyline: +235)
• 6/27/2023: 7-4 WSH (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -240, Underdog Moneyline: +198)
• 6/26/2023: 8-4 SEA (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -260, Underdog Moneyline: +215)
• 8/24/2022: 3-1 WSH (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -335, Underdog Moneyline: +270)
• 8/23/2022: 4-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -290, Underdog Moneyline: +235)
• 7/13/2022: 2-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -118, Underdog Moneyline: -100)

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