Mariners vs Royals Prediction, Odds, Moneyline, Spread & Over/Under for May 1

Odds updated as of 4:13 a.m.

MLB action on Friday includes the Seattle Mariners taking on the Kansas City Royals.

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

• Seattle Mariners (16-16) vs. Kansas City Royals (12-19)
• Date: Friday, May 1, 2026
• Time: 9:45 p.m. ET
• Venue: T-Mobile Park — Seattle, Washington
• Coverage: Apple TV+

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-152) | KC: (+128)
• Spread: SEA: -1.5 (+150) | KC: +1.5 (-182)
• Total: 7 — Over: (-110) | Under: (-110)

Mariners vs Royals Probable Starting Pitchers

Probable Pitchers: Bryan Woo (Mariners) – 1-2, 3.86 ERA vs Cole Ragans (Royals) – 1-4, 5.00 ERA

The probable starters are Bryan Woo (1-2) for the Mariners and Cole Ragans (1-4) for the Royals. Woo’s team is 3-3-0 against the spread this season in his starts. When Woo starts a game and his team is the favorite on the moneyline, they have a record of 3-3. The Royals have gone 1-4-0 against the spread when Ragans starts. The Royals were the underdog on the moneyline for two Ragans starts this season — they lost both.

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (55.3%)

• The Mariners vs Royals moneyline has Seattle as a -152 favorite, while Kansas City is a +128 underdog on the road.

• The Mariners are hosting the Royals and are favored by 1.5 runs on the spread. The Mariners are +150 to cover the runline, with the Royals being -182.

• The over/under for Mariners-Royals on May 1 is 7. The over is -110, and the under is -110.

Bet on Seattle Mariners vs. Kansas City Royals on FanDuel today!

• The Mariners have won in 15, or 53.6%, of the 28 contests they have been named as odds-on favorites in this year.
• This season Seattle has come away with a win seven times in 12 chances when named as a favorite of at least -152 on the moneyline.
• The Mariners and their opponents have gone over the total this season in 15 of their 32 opportunities.
• The Mariners have posted a record of 12-20-0 against the spread this season.
• The Royals have won 21.4% of the games this season they were the moneyline underdog (3-11).
• Kansas City has played as a moneyline underdog of +128 or longer in only two games this season, which it lost both.
• The Royals have combined with opponents to hit the over on the total 12 times this season for a 12-17-0 record against the over/under.
• The Royals have a 12-17-0 record against the spread this season (covering 41.4% of the time).

• Randy Arozarena leads Seattle with 33 hits and an OBP of .381, plus a team-best slugging percentage of .439. He’s batting .289.
• Among qualifying batters in MLB, he is 34th in batting average, 24th in on-base percentage, and 65th in slugging.
• Cole Young is batting .286 with four doubles, a triple, three home runs and 11 walks, while slugging .420 with an on-base percentage of .357.
• He is 38th in batting average, 52nd in on-base percentage and 82nd in slugging in MLB.
• Young brings a two-game streak with at least one hit into this matchup. During his last five outings he is batting .556 with two doubles, a home run and seven RBIs.
• Cal Raleigh has collected 24 base hits, an OBP of .275 and a slugging percentage of .392 this season.
• Josh Naylor has been key for Seattle with 24 hits, an OBP of .286 plus a slugging percentage of .336.

Royals Player Leaders

• Bobby Witt Jr. has an on-base percentage of .367 and a slugging percentage of .430. Both lead the Royals. He’s batting .289.
• Including all qualified hitters, he ranks 34th in batting average, while his on-base percentage is 38th and he is 72nd in slugging.
• Maikel Garcia is hitting .274 with eight doubles, a triple, three home runs and 12 walks. He’s slugging .442 with an on-base percentage of .341.
• Including all qualifying players, he is 51st in batting average, 72nd in on-base percentage and 63rd in slugging percentage.
• Carter Jensen has racked up 23 hits, a team-best for the Royals.
• Vinnie Pasquantino has three doubles, two triples, three home runs and 16 walks while hitting .165.

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