Mariners vs Nationals Prediction, Odds, Moneyline, Spread & Over/Under for May 27

Odds updated as of 9:13 p.m.

The Seattle Mariners are among the MLB teams busy on Tuesday, versus the Washington Nationals.

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 (29-23) vs. Washington Nationals (24-29)
• Date: Tuesday, May 27, 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: (-164) | WSH: (+138)
• Spread: SEA: -1.5 (+128) | WSH: +1.5 (-154)
• Total: 8.5 -- Over: (-104) | Under: (-118)

Mariners vs Nationals Probable Starting Pitchers

Probable Pitchers: Logan Evans (Mariners) - 2-1, 5.00 ERA vs Mitchell Parker (Nationals) - 4-3, 4.39 ERA

The Mariners will give the nod to Logan Evans (2-1) versus the Nationals and Mitchell Parker (4-3). Evans and his team are 1-4-0 ATS this season when he starts. When Evans starts a game and his team is the favorite on the moneyline, they have a record of 2-1. The Nationals are 7-2-0 against the spread when Parker starts. The Nationals are 6-1 in Parker's seven starts this season that they were the underdog on the moneyline.

Mariners vs Nationals Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (58.1%)

Mariners vs Nationals Moneyline

• Seattle is a -164 favorite on the moneyline, while Washington is a +138 underdog on the road.

Mariners vs Nationals Spread

• The Nationals are +1.5 on the spread (-154 to cover), and Seattle is +128 to cover the runline.

Mariners vs Nationals Over/Under

• The over/under for the Mariners versus Nationals game on May 27 has been set at 8.5, with -104 odds on the over and -118 odds on the under.

Bet on Seattle Mariners vs. Washington Nationals on FanDuel today!

Mariners vs Nationals Betting Trends

• The Mariners have won in 17, or 54.8%, of the 31 contests they have been named as odds-on favorites in this year.
• This season Seattle has been victorious five times in nine chances when named as a favorite of at least -164 on the moneyline.
• The Mariners' games have gone over the total in 27 of their 51 opportunities.
• The Mariners have posted a record of 25-26-0 against the spread this season.
• The Nationals have been the moneyline underdog 40 total times this season. They've gone 21-19 in those games.
• When it has played as a moneyline underdog with odds of +138 or longer, Washington has a 9-9 record (winning 50% of its games).
• The Nationals have had an over/under set by bookmakers 51 times, and have combined with opponents to go over the total in 24 of those games (24-26-1).
• The Nationals have a 28-23-0 record ATS this season (covering 54.9% of the time).

Mariners Player Leaders

• Cal Raleigh leads Seattle in total hits (48) this season while batting .254 with 27 extra-base hits. He has an on-base percentage of .372 and a slugging percentage of .577.
• Among all qualifying batters, he ranks 86th in batting average, his on-base percentage ranks 27th, and he is fourth in slugging.
• Julio Rodriguez has an OPS of .725, fueled by an OBP of .312 and a team-best slugging percentage of .413 this season. He's batting .236.
• He ranks 116th in batting average, 109th in on-base percentage and 85th in slugging in MLB.
• Jorge Polanco is batting .282 with a .557 slugging percentage and 30 RBI this year.
• J.P. Crawford leads Seattle in OBP (.379) this season, fueled by 45 hits.

Nationals Player Leaders

• James Wood has accumulated a team-best OBP (.378) and slugging percentage (.542), and leads the Nationals in hits (57, while batting .284).
• Including all the qualified hitters in the big leagues, he ranks 30th in batting average, 22nd in on-base percentage and 10th in slugging percentage.
• C.J. Abrams is batting .294 with 10 doubles, two triples, eight home runs and 11 walks. He's slugging .531 with an on-base percentage of .352.
• He is 20th in batting average, 49th in on-base percentage and 16th in slugging percentage in MLB.
• Nathaniel Lowe has nine doubles, eight home runs and 19 walks while batting .224.
• Luis Garcia has nine doubles, four home runs and 11 walks while batting .231.

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