Mets vs Mariners Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 15

Odds updated as of 2:11 a.m.

The MLB's Friday slate includes the New York Mets facing the Seattle Mariners.

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

Mets vs Mariners Game Info

• New York Mets (64-57) vs. Seattle Mariners (67-55)
• Date: Friday, August 15, 2025
• Time: 7:10 p.m. ET
• Venue: Citi Field -- Queens, New York
• Coverage: MLB Network, SNY, and ROOT Sports NW

Mets vs Mariners Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: NYM: (-118) | SEA: (-100)
• Spread: NYM: +1.5 (-188) | SEA: -1.5 (+155)
• Total: 8.5 -- Over: (-100) | Under: (-122)

Mets vs Mariners Probable Starting Pitchers

Probable Pitchers: Sean Manaea (Mets) - 1-1, 4.33 ERA vs Luis Castillo (Mariners) - 8-6, 3.19 ERA

The probable pitchers are Sean Manaea (1-1) for the Mets and Luis Castillo (8-6) for the Mariners. Manaea's team is 1-4-0 against the spread this season in his starts. Manaea's team has won 25% of his starts when they are favored on the moneyline (1-3). The Mariners have gone 10-14-0 ATS in Castillo's 24 starts that had a set spread. The Mariners have been the moneyline underdog in four of Castillo's starts this season, and they went 2-2 in those matchups.

Mets vs Mariners Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (50.4%)

Mets vs Mariners Moneyline

• Looking at the moneyline for Mariners-Mets, Seattle is the underdog at -100, and New York is -118 playing at home.

Mets vs Mariners Spread

• The Mariners are 1.5-run favorites against the spread for this matchup with the Mets. The Mariners are +155 to cover, while the Mets are -188 to cover as a 1.5-run underdog on the runline.

Mets vs Mariners Over/Under

• Mets versus Mariners on Aug. 15 has an over/under of 8.5 runs, with the odds on the over -100 and the under set at -122.

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Mets vs Mariners Betting Trends

• The Mets have come away with 50 wins in the 81 contests they have been listed as the favorites in this season.
• This season New York has been victorious 46 times in 76 chances when named as a favorite of at least -118 on the moneyline.
• Contests with the Mets have gone over the total set by oddsmakers in 51 of 115 chances this season.
• The Mets have an against the spread record of 54-61-0 in 115 games with a line this season.
• The Mariners have compiled a 16-16 record in games they were listed as the moneyline underdog (winning 50% of those games).
• Seattle is 15-11 (winning 57.7% of its games) when it has played as a moneyline underdog of -100 or longer.
• In the 118 games bookmakers have set an over/under for the Mariners, they have combined with opponents to go over the total 61 times (61-52-5).
• The Mariners have put together a 51-67-0 record against the spread this season (covering 43.2% of the time).

Mets Player Leaders

• Juan Soto leads New York with an OBP of .384 this season while batting .252 with 92 walks and 86 runs scored. He has a slugging percentage of .494.
• Among qualifying hitters in baseball, his batting average ranks 95th, his on-base percentage ranks eighth, and he is 23rd in slugging.
• Soto has recorded a base hit in seven games in a row. During his last 10 outings he is batting .297 with four home runs, eight walks and six RBIs.
• Pete Alonso leads New York in slugging percentage (.528) and total hits (123) this season. He's batting .272 with an on-base percentage of .356.
• Among all qualifying players, he ranks 47th in batting average, 36th in on-base percentage and 11th in slugging percentage.
• Alonso brings a five-game streak with at least one hit into this contest. In his last five games he is batting .476 with three doubles, three home runs and eight RBIs.
• Francisco Lindor has 120 hits this season and has a slash line of .249/.320/.435.
• Lindor has recorded at least one base hit in three straight games. In his last five games he is batting .300 with a double, a home run, three walks and an RBI.
• Brandon Nimmo is batting .251 with a .322 OBP and 67 RBI for New York this season.
• Nimmo enters this game on a three-game hitting streak. During his last five outings he is batting .222 with a double, a home run, three walks and four RBIs.

Mariners Player Leaders

• Cal Raleigh leads the Mariners with 108 hits. He's batting .243 and slugging .582 with an on-base percentage of .350.
• Including all the qualified hitters in MLB, his batting average ranks 117th, his on-base percentage is 43rd, and he is third in slugging.
• Josh Naylor leads his team with a .359 OBP. He has a batting average of .292 while slugging .459.
• He is currently 17th in batting average, 28th in on-base percentage and 51st in slugging percentage among all qualifying hitters.
• Julio Rodriguez has racked up a team-best .457 slugging percentage.
• Eugenio Suarez is hitting .234 with 20 doubles, 37 home runs and 32 walks.

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