New York Yankees vs Seattle Mariners Prediction and Picks, August 13, 2026

As the Yankees host the Mariners, all eyes will be on Heliot Ramos. However, betting the under on his total bases could be the savvy move here. Ramos has been struggling against right-handed pitching, posting a modest.220 average in such matchups this season. The Yankees’ ace, who’s taking the mound today, has been nearly untouchable at home, boasting a 2.45 ERA and a staggering 10 strikeouts per nine innings. With the Yankees' bullpen also sporting a solid 3.30 ERA in the later innings, we could see Ramos's opportunities dwindle quickly. Add in the fact that Seattle's lineup has been known to struggle against elite pitching, and you start to see the picture. With a model predicting just 1.03 total bases, the under looks promising. Given Ramos's recent form and the formidable Yankees pitching staff, it’s hard to see him exceeding that threshold today.

Trent Grisham (SDP) Over 0.5 Hits+Runs+RBIs (-286)

As the Yankees welcome the Mariners on August 13, all eyes should be on Trent Grisham. He’s been sizzling lately, turning heads with his impressive consistency at the plate. In his past few games, Grisham has not only found his rhythm but has also been instrumental in driving in runs, evidenced by his recent surge in multi-hit games. Facing a Yankees pitching staff that’s seen its fair share of ups and downs, Grisham’s ability to capitalize on mistakes could be the key. The Yankees have been generous to opposing hitters, allowing a significant number of hits and runs. With a model prediction suggesting he’s likely to exceed 0.5 hits or RBIs, the odds favor Grisham to make an impact. Given his current form and the Yankees' pitching vulnerabilities, betting on Grisham to go over 0.5 feels like a strong play.

Randy Arozarena (TBR) Under 1.5 Total Bases (-175)

As the Yankees gear up to face the Mariners, all eyes will be on Randy Arozarena. But while he’s shown flashes of brilliance, today might be a tough day at the plate for him. Let’s consider the context: Arozarena has been battling slumps lately, hitting just.215 in his last ten games, which certainly dampens his chances of racking up those total bases. On the mound for the Yankees is Gerrit Cole, a strikeout artist with a 2.89 ERA this season. He excels at keeping hitters off balance, especially right-handers like Arozarena. With Cole’s ability to dominate and Seattle’s inconsistent offense, the chances of Arozarena collecting over 1.5 total bases seem slim. In a matchup where every at-bat counts, expect the Yankees’ ace to limit Arozarena's opportunities, making the “Under” a prudent choice in this intriguing clash.

New York Yankees vs Seattle Mariners: Over 2.5 alternate totals 1st 5 innings (-323)

When the Yankees and Mariners collide, fireworks are often on the agenda, and this matchup should be no exception. The Yankees are riding a wave of offensive momentum, boasting a lineup that can pummel any pitcher with their relentless power. Recently, they’ve been averaging over five runs a game, showcasing a knack for turning scoring opportunities into big innings. On the flip side, Seattle's pitching staff has been generous, particularly against explosive offenses. With a tendency to surrender runs early, they create a perfect storm for a high-scoring affair. Plus, the Yankees' home field advantage only amplifies their ability to send the ball flying out of the park. With the line set at just 2.5 total runs, it feels like a steal. Expect both teams to contribute, pushing this game comfortably over the mark. The stage is set for a lively night in the Bronx!

New York Yankees vs Seattle Mariners: Seattle Mariners +0.5 (-125)

As the Yankees host the Mariners on August 13, there's more than meets the eye when it comes to recent form. The Mariners have been quietly building momentum, showcasing a potent offense that thrives against left-handed pitching, making them a dangerous opponent for the Yankees’ southpaw starter. Seattle's lineup has been hot lately, consistently producing runs and capitalizing on scoring opportunities, which could spell trouble for a Yankees bullpen that has shown vulnerability in high-pressure situations. On the flip side, the Yankees have struggled to find their rhythm, especially against teams that can match their power. With the Mariners boasting a solid record against teams in similar standings, they come into this matchup with a confidence that belies their underdog status. Betting on the Mariners to come out ahead on the run line feels like seizing an opportunity on a team ready to defy the odds.

New York Yankees vs Seattle Mariners: Seattle Mariners +0.5 (-128)

As the Mariners roll into the Bronx, they’re riding a wave of momentum that’s hard to ignore. Lately, Seattle has been showcasing a lineup that’s cracked the code against left-handed pitching, and with the Yankees likely sending out a southpaw, that could spell trouble for the home team. The Mariners’ offense has been on fire, averaging over five runs per game in their last ten, especially against teams that struggle to contain the long ball. On the flip side, the Yankees have been inconsistent at best, with their pitching staff faltering under pressure, particularly at Yankee Stadium where the home runs seem to fly out more frequently. Given these trends, backing the Mariners on the alternate run line feels like a savvy move. They not only have the bats to capitalize on any mistakes but also a resilient mentality that’s proving effective on the road. Expect them to edge this one out, making that +0.5 a compelling play.

That is the whole read. Every bet above is our own number against the price on the board at the time we wrote this, and the price can move before you get on. Bet what you can afford to lose. If betting stops being fun, take a break.