The New York Yankees (3-0) are looking to remain unbeaten to begin the 2026 MLB season when they continue their road trip against the Seattle Mariners (2-2) on Monday, March 30. The American League squads will battle at 9:40 p.m. ET tonight.
The Yankees won five of the six games between the two teams during the 2025 season. Monday’s pitching matchup features Yankees SP Ryan Weathers (4.03 xFIP in 2025) and Mariners SP Luis Castillo (4.09 xFIP in 2025) going head-to-head on the mound.
Below, we’ll break down our Yankees vs. Mariners prediction and picks for tonight’s game. Make your MLB picks on PrizePicks and earn real money if you’re right, including on game winners, spreads, and totals!
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Yankees vs. Mariners Prediction, Spread, Over/Under
After an underwhelming playoff exit in 2025, the Yankees have gotten off to a strong start early in 2026. New York began the campaign with a three-game sweep of the San Francisco Giants on the road.
The Yankees outscored the Giants 13-1 in those three games and received some spectacular starting pitching from the likes of Max Fried, Cam Schlittler, and Will Warren. Although he went 2-for-13 and struck out seven times, New York star OF Aaron Judge did manage to slug a pair of home runs in the Bay Area.
The Mariners split a four-game set against the Cleveland Guardians at home. Despite dropping two games, Seattle still has scored the fifth-most runs (14) across the majors to start off the new campaign.
After dropping a 6-5 10-inning affair on Saturday, the Mariners recorded a statement 8-0 win to finish off the series on Sunday evening. Seattle was paced by a four-run fifth inning, which included a three-run home run courtesy of 3B Brendan Donovan.
SP Emerson Hancock tossed six no-hit innings and registered a career-high 9 strikeouts to keep the Guardians off the scoreboard.
Yankees vs. Mariners Spread, Over/Under
The Mariners are home underdogs tonight, returning a 1.88x payout on PrizePicks Team Picks if they win outright.
The Yankees are road favorites and return a 1.88x payout if they win outright, per PrizePicks Team Picks, where you can earn money with your picks in 35 states.
- Spread: New York Yankees -1.5 (2.5x payout)
- Over/Under: 7.5 Runs (1.81x payout on over)
- Game Winner Payout: Yankees 1.88x | Mariners 1.88x
Team Picks data is live as of writing and is subject to change.
Yankees vs. Mariners Prediction on Spread – 3/30/26
Here are the key stats to know before locking in your Yankees vs. Mariners prediction on the 1.5-run spread for Monday, March 30, on PrizePicks.
- The Yankees have a 3-0 record against-the-spread (ATS) record as a road favorite in 2026 after going 30-40 ATS in that scenario in 2025.
- The Mariners are 2-2 ATS in four games in 2026 thus far. New York was 4-2 ATS in six meetings with Seattle last season.
- According to FanGraphs, the Yankees rank fourth in the majors in xFIP (2.90) behind only the Toronto Blue Jays (1.06), Milwaukee Brewers (1.88), and Philadelphia Phillies (2.43).
- Mariners SP Luis Castillo has a 1-3 career record, a 2.74 ERA, and 37 strikeouts in seven career appearances vs. the Yankees.
- The Yankees have thrived at the plate so far this season, producing the seventh-best wRC+ (104).
- New York has given up just 1 earned run in three games in 2026, ranking first in MLB. Meanwhile, Seattle has surrendered 12 runs across four games.
- Per Baseball Savant, Yankees SP Ryan Weathers had a fastball velocity of 96.8 mph during the 2025 season, which ranked in the 86th percentile. He also had an 8.87 K/9, 4.65 xFIP, and 37.7 ground-ball rate across 22.1 road innings.
- T-Mobile Park is more of a pitcher-friendly park. Only 93 total home runs were hit within its confines in 2025, ranking 20th.
Yankees vs. Mariners Picks for PrizePicks Today: 3/30/26
Here are two of the top Yankees vs. Mariners picks to consider for Monday, March 30. Today's PrizePicks MLB player picks feature Mariners SP Luis Castillo and Yankees SS Jose Caballero.
Mariners SP Luis Castillo vs. Yankees Projection: 5.5 Ks
- The Yankees produced the fourth-most strikeouts (1,440) in 2025, which averaged out to 8.89 per game. New York is averaging 9.67 strikeouts per game so far in 2026.
- Castillo struck out 21.7% of the batters that he faced during the 2025 season. However, the veteran right-hander struck out 24.7% of the batters he faced at home.
- Castillo struck out at least six batters in 11 starts throughout the 2025 season.
- The Mariners' standout SP had an average fastball velocity of 94.9 mph a year ago.
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Yankees SS Jose Caballero vs. Mariners Projection: 0.5 Hits
- Caballero has registered at least 1 hit in two of his three games in 2026.
- The Yankees SS is hitting .250 (3-for-12), including going 2-for-4 against the Giants on Saturday.
- Caballero spent his rookie MLB season with the Mariners, so he could be comfortable hitting at T-Mobile Park. He produced a slash line of .221/.343/.320 in 231 at-bats in 2023 with Seattle.
- Caballero struck out 26.8% of the time in 2025, ranking in the 14th percentile.
Make Yankees vs. Mariners Picks on PrizePicks
Early in the 2026 MLB season, a potential American League playoff preview takes place as the Mariners host the Yankees in a three-game set, beginning on Monday. New York (4.76x payout) and Seattle (5.55x payout) are the top two teams projected to win the American League pennant, via PrizePicks Team Picks.
You can make Yankees vs. Mariners picks on PrizePicks and PrizePicks Team Picks to earn real money. Just pick MLB players, predict More or Less on their projected stats, and cash in if you’re correct. And with Team Picks, you can make predictions on winners, spreads, and over/unders, now available in 35 states.
Stick around with the Playbook for continued MLB predictions, picks, and news throughout the 2026 season.
