Mariners vs Royals Prediction, Odds, Moneyline, Spread & Over/Under for May 24

Odds updated as of 10:12 p.m.

The MLB slate on Sunday includes the Seattle Mariners taking on the Kansas City Royals.

Before you do any MLB betting on this matchup at FanDuel Sportsbook, here’s what you need to know.

Seattle Mariners (25-28) vs. Kansas City Royals (21-31)
Date: Sunday, May 24, 2026
Time: 2:10 p.m. ET
Venue: Kauffman Stadium — Kansas City, Missouri
Coverage: Royals.TV and Mariners.TV

All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
Moneyline: SEA: (-138) | KC: (+118)
Spread: SEA: -1.5 (+122) | KC: +1.5 (-146)
Total: 8.5 — Over: (-115) | Under: (-105)

Mariners vs Royals Probable Starting Pitchers

Probable Pitchers: Bryan Woo (Mariners) – 4-2, 3.51 ERA vs Seth Lugo (Royals) – 1-4, 3.68 ERA

The Mariners will look to Bryan Woo (4-2) versus the Royals and Seth Lugo (1-4). Woo’s team is 6-4-0 against the spread in his starts this season. When Woo starts a game and his team is the favorite on the moneyline, they have a record of 6-4. The Royals have a 5-5-0 ATS record in Lugo’s 10 starts that had a set spread. The Royals are 2-3 in Lugo’s five starts this season that they were the underdog on the moneyline.

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (59%)

The Mariners vs Royals moneyline has Seattle as a -138 favorite, while Kansas City is a +118 underdog at home.

The Mariners are at the Royals and are favored by 1.5 runs on the spread. The Mariners are +122 to cover the runline, with the Royals being -146.

The Mariners-Royals game on May 24 has been given an over/under of 8.5 runs. The over is set at -115 and the under at -105.

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

The Mariners have come away with 24 wins in the 49 contests they have been listed as the favorites in this season.
This year Seattle has won 15 of 26 games when listed as at least -138 on the moneyline.
The Mariners and their opponents have hit the over in 23 of their 53 games with a total set by oddsmakers this season.
The Mariners are 19-34-0 against the spread in their 53 games with a line set by sportsbooks this season.
The Royals have gone 9-15 in games they were the underdog on the moneyline (winning 37.5% of those games).
Kansas City has a 3-3 record (winning 50% of its games) when it has played as a moneyline underdog of +118 or longer.
The Royals have played in 49 games with a set over/under, and have combined with opponents to go over the total 21 times (21-28-0).
The Royals have covered 42.9% of their games this season, going 21-28-0 ATS.

Randy Arozarena leads Seattle in OBP (.389), slugging percentage (.455) and total hits (55) this season. He has a .294 batting average.
Among qualifying hitters in MLB, his batting average ranks 18th, his on-base percentage ranks 13th, and he is 50th in slugging.
Julio Rodriguez is hitting .257 with 11 doubles, eight home runs and 18 walks. He’s slugging .424 with an on-base percentage of .322.
He ranks 72nd in batting average, 90th in on-base percentage and 73rd in slugging among qualifying hitters.
Josh Naylor is batting .246 with a .351 slugging percentage and 22 RBI this year.
J.P. Crawford is batting .199 with a .342 OBP and 16 RBI for Seattle this season.

Royals Player Leaders

Bobby Witt Jr. has racked up 61 hits with a .365 on-base percentage and a .473 slugging percentage, all club-highs for the Royals. He’s batting .298.
Including all the qualifying hitters in MLB, his batting average places him 15th, his on-base percentage is 34th, and he is 39th in slugging.
Maikel Garcia is batting .260 with 14 doubles, a triple, three home runs and 19 walks. He’s slugging .385 with an on-base percentage of .321.
Including all qualified hitters, he ranks 68th in batting average, 93rd in on-base percentage and 102nd in slugging percentage.
Vinnie Pasquantino has four doubles, two triples, five home runs and 22 walks while hitting .198.
Salvador Perez has five doubles, eight home runs and nine walks while batting .202.

5/23/2026: 5-0 KC (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -130, Underdog Moneyline: +110)
5/22/2026: 2-0 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -118, Underdog Moneyline: +100)
5/3/2026: 4-1 KC (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -116, Underdog Moneyline: -102)
5/2/2026: 3-2 KC (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -142, Underdog Moneyline: +120)
5/1/2026: 7-6 KC (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -148, Underdog Moneyline: +126)
9/18/2025: 2-0 SEA (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -120, Underdog Moneyline: +102)
9/17/2025: 7-5 KC (Favorite: Royals, Spread: -1.5, Total: 8.5, Favorite Moneyline: -124, Underdog Moneyline: +106)
9/16/2025: 12-5 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -136, Underdog Moneyline: +116)
7/3/2025: 3-2 KC (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -120, Underdog Moneyline: +102)
7/2/2025: 3-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -166, Underdog Moneyline: +140)