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

Odds updated as of 4:16 a.m.

In MLB action on Friday, the New York Mets play the Seattle Mariners.

All the information you need to make smart wagers on this matchup at FanDuel Sportsbook can be found below. Check out all of the latest MLB betting lines here.

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 Mets will look to Sean Manaea (1-1) versus the Mariners and Luis Castillo (8-6). Manaea's team is 1-4-0 against the spread in his starts this season. Manaea's team is 1-3 this season when he starts and they are the moneyline favorite. When Castillo starts, the Mariners are 10-14-0 against the spread. The Mariners are 2-2 in Castillo's four starts this season that they were the underdog on the moneyline.

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

• The moneyline numbers for Mets vs. Mariners reveal New York as the favorite (-118) and Seattle as the underdog (-100) on the road.

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

• A combined run total of 8.5 has been set for Mets-Mariners on Aug. 15, with the over at -100 and the under at -122.

Bet on New York Mets vs. Seattle Mariners on FanDuel today!

Mets vs Mariners Betting Trends

• The Mets have been chosen as favorites in 81 games this year and have walked away with the win 50 times (61.7%) in those games.
• This season New York has come away with a win 46 times in 76 chances when named as a favorite of at least -118 on the moneyline.
• The Mets and their opponents have gone over in 51 of their 115 games with a total set by sportsbooks this season.
• The Mets are 54-61-0 against the spread in their 115 games that had a posted line this season.
• The Mariners have won 50% of the games this season they were the moneyline underdog (16-16).
• Seattle has gone 15-11 when it has played as a moneyline underdog with odds of -100 or longer (57.7%).
• The Mariners have combined with opponents to go over the total 61 times this season for a 61-52-5 record against the over/under.
• The Mariners have put together a 51-67-0 record ATS 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 the majors, he is 95th in batting average, eighth in on-base percentage, and 23rd in slugging.
• Soto hopes to build on a seven-game hitting streak in this matchup. During his last 10 games he is hitting .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.
• His batting average ranks 47th among qualified players, his on-base percentage 36th, and his slugging percentage 11th.
• Alonso takes a five-game streak with at least one hit into this one. In his last five games he is hitting .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 heads into this game with three games in a row with at least one hit. In his last five games he is hitting .300 with a double, a home run, three walks and an RBI.
• Brandon Nimmo has been key for New York with 110 hits, an OBP of .322 plus a slugging percentage of .438.
• Nimmo enters this matchup on a three-game hitting streak. In his last five games he is batting .222 with a double, a home run, three walks and four RBIs.

Mariners Player Leaders

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

Sign up for FanDuel Sportsbook and FanDuel Daily Fantasy today!