Mariners vs. Mets Predictions, Odds & Best Bets: Which Team Will Improve Its Playoff Status?

Will the Mariners continue to struggle against winning teams as they look to keep pace in the American League?
Mariners vs. Mets  Predictions, Odds & Best Bets: Friday, Aug. 15
Pictured: Seattle Mariners starting pitcher Luis Castillo is a centerpiece of our Mariners vs. Mets prediction. Photo by Steven Bisig via Imagn Images.

The Seattle Mariners and New York Mets are both in tight divisional and wild card races in their respective leagues, and our Mariners vs. Mets prediction breaks down which team will improve its playoff status. First pitch for this interleague matchup from Citi Field is set for 7:10 p.m. ET (MLBN).

The Mets are -120 moneyline favorites at our best sports betting sites, and our Mariners vs. Mets best bets expect a Seattle victory in spite of a low strikeout ceiling for its starting pitcher.

⚾ Mariners vs. Mets predictions & odds

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💰 Mariners vs. Mets prediction & best bet

✅ Mariners vs. Mets prediction: Mariners to win (+102 via FanDuel)

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Seattle was cooled off after an eight-game winning streak, dropping the last two games of its previous series to the Baltimore Orioles. But I still have more faith in the AL West squad now and going forward, which is why I am backing the road underdogs with my Mariners vs. Mets prediction.

The Mariners played outstanding baseball during their eight-game winning streak in all facets. The offense averaged 5.3 runs per game while belting 15 home runs and combining for a .753 OPS. And in the pitching department, the starters combined for a 2.79 ERA, while the bullpen pitched to a respectable 3.16 ERA.

Seattle also gets the nod with my Mariners vs. Mets best bet, as it is 19-12 against left-handed starting pitchers, making it one of five MLB teams seven-plus games above .500 in that split. That should come in handy against Sean Manaea, who has allowed nine earned runs in his last 9 2/3 innings, while the team is just 1-5 in his six starts.

New York has lost each of its last nine games against teams with a winning record, which makes these +102 odds at FanDuel (compared to the +100 at the competing best sportsbooks) even more enticing.

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💰 Best Mariners vs. Mets player prop

✅ Best Mariners vs. Mets player prop: Luis Castillo Under 4.5 strikeouts (+115 via Caesars)

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Seattle righty Castillo is on pace for his lowest K/9 rate (7.8) of his nine-year career. His strikeout rate has also been on the decline for four straight years, and his low ceiling for strikeouts makes the Under my best Mariners vs. Mets player prop.

New York may be 2-7 in its last nine home games, but its offense has had one of the best contact rates in home games for quite some time. The Mets have struck out at the N.L.’s lowest rate (18.7%) in home games against right-handed pitching since the start of July. 

Meanwhile, Castillo has recorded four or fewer strikeouts in three of his previous four road starts. That makes Caesars’ +115 odds such a great value, especially compared to the +110 odds with a 47.62% implied probability at other top sports betting sites.

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