• The Mariners are -140 favorites vs the Royals
• Mariners vs Royals Over / Under today: 8.5 Runs
• Mariners / Royals TV Channel: RYTV | MRTV

The Seattle Mariners (-140) visit Kauffman Stadium to take on the Kansas City Royals (+115) on May 24, 2026. First pitch is scheduled for 2:10 pm in Kansas City, MO.

This season, the Mariners are 25-27 against the spread (ATS), while the Royals are 20-29 ATS.

Mariners vs Royals Starting Pitchers Today:

• Mariners starting pitcher: Bryan Woo 4-2, 3.51 ERA
• Royals starting pitcher: Seth Lugo 1-4, 3.73 ERA

Mariners vs. Royals Odds, Run Line, Over/Under & Moneyline

Mariners vs Royals Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Sunday‘s MLB game with 60.0% confidence, factoring in game simulations, recent player performances, starting pitchers and injuries.

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We’ve highlighted some favorite MLB player prop bets for Mariners players for Sunday‘s game, looking at profitable historical betting trends:

Best Mariners Player Prop Bets Today:

• player high – away 

And here are some favorite MLB player prop bets for Royals players for Sunday‘s game, looking at profitable historical betting trends:

Best Royals Player Prop Best Bets Today:

• player  high – home

Mariners Best Bets Today:

• The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Under in 22 of their last 35 games (+7.60 Units / 18% ROI)
• The Seattle Mariners have hit the Team Total Under in 17 of their last 25 away games (+7.55 Units / 26% ROI)
• The Seattle Mariners have hit the Game Total Under in 15 of their last 24 away games (+6.40 Units / 25% ROI)
• The Seattle Mariners have covered the Run Line in 7 of their last 10 away games (+5.85 Units / 57% ROI)
• The Seattle Mariners have hit the 1st Five Innings (F5) Moneyline in 5 of their last 6 away games (+5.00 Units / 58% ROI)

Royals Best Bets Today:

• The Kansas City Royals have hit the 1st Five Innings (F5) Team Total Under in 32 of their last 50 games (+12.10 Units / 20% ROI)
• The Kansas City Royals have hit the Team Total Under in their last 8 games (+8.00 Units / 81% ROI)
• The Kansas City Royals have hit the 1st Five Innings (F5) Moneyline in 11 of their last 20 games at home (+5.85 Units / 21% ROI)
• The Kansas City Royals have covered the 1st Five Innings (F5) Run Line in 13 of their last 20 games at home (+5.60 Units / 23% ROI)
• The Kansas City Royals have hit the Game Total Under in 28 of their last 50 games at home (+4.10 Units / 8% ROI)

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 19-33 against the Run Line (-9.95 Units / -18.12% ROI).

• 25-27 when betting on the Moneyline for -11.75 Units / -16.02% ROI
• 23-27 when betting on the total runs Over for -6.85 Units / -11.91% ROI
• 27-23 when betting on the total runs Under for +1.7 Units / 2.98% ROI

Royals Against the Spread (ATS) Record

Against the spread this season, the Royals are 20-29 against the Run Line (-13.9 Units / -20.37% ROI).

• 20-31 when betting on the Moneyline for -15.7 Units / -25.74% ROI
• 22-29 when betting on the total runs Over for -9.65 Units / -17.26% ROI
• 29-22 when betting on the total runs Under for +4.85 Units / 8.61% ROI

Royals vs Mariners Home Run Prop Bets Today

Royals vs Mariners Total Hits Prop Bets Today

Royals vs Mariners Strikeout Prop Bets Today

Mariners Keys to the Game vs. the Royals

The Mariners are just 3-13 (.188) vs bottom 10 scoring offenses this season Today, they face the Royals (28th in runs scored).

The Mariners are just 19-4 (.826) when leading entering the 8th inning this season — 5th lowest in MLB; League Avg: .895.

The Mariners are 25-15 (.625) when tied entering the 7th inning since the 2025 season — tied for 3rd best in MLB; League Avg: .500.

The Mariners are 6-83 (.067) when trailing entering the 9th inning since the 2025 season — tied for 4th best in MLB; League Avg: .045.

Royals Keys to the Game vs. the Mariners

The Royals are just 3-11 (.214) when their opponents score in the first inning this season — 2nd lowest in MLB; League Avg: .366.

The Royals are just 1-14 (.067) when allowing 10 or more hits this season — 2nd lowest in MLB; League Avg: .246.

The Royals are just 16-4 (.800) when leading entering the 8th inning this season — 2nd lowest in MLB; League Avg: .895.

The Royals are just 21-31 (.404) this season — tied for 4th lowest in MLB; League Avg: .500.

Mariners Hitting Stats & Trends

The Mariners are batting just .189 against LHP this season — lowest in MLB.

Mariners hitters have an OPS of just .592 (591 PA’s) against LHP this season — lowest in MLB.

Mariners hitters have put just 31% of their swings in play with runners in scoring position this season — lowest in MLB.

Mariners hitters have an OBP of just .277 (591 PA’s) against LHP this season — 2nd lowest in MLB.

Royals Hitting Stats & Trends

Royals hitters have an OPS of just .434 (1,004 PA’s) with two-strikes this season — lowest in MLB.

Royals hitters are slugging just .338 on the road this season — lowest in MLB.

Royals hitters are slugging just .206 with two-strikes this season — lowest in MLB.

31% of Royals hitters strikeouts have come on 95+ MPH fastballs this season — 2nd highest in MLB.

Mariners Pitching Stats & Trends

Mariners pitchers have a first-pitch strike rate of 67% this season — highest in MLB.

Mariners pitchers have thrown at least two strikes in their first three pitches to 70% of opposing batters this season — highest in MLB.

Mariners pitchers have walked 7% of batters this season — best in MLB.

Opponents have a swing rate of 51% against the Mariners pitchers this season — highest in MLB.

Royals Pitching Stats & Trends

Royals pitchers have walked 11% of batters this season — 4th highest in MLB.

Royals pitchers have a strikeout rate of just 19% in late innings this season — 3rd lowest in MLB.

Royals pitchers have a first-pitch strike rate of just 59% this season — 4th lowest in MLB.

The Royals pitchers have allowed an average Exit Velocity of 89.6 MPH this season (1,223 balls in play) — 5th highest in MLB

More MLB Reading:

• Home Run Predictions Today
• Best NRFI Bets Today
• Strikeout Props Today
• MLB Starting Pitchers Today

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