Royals vs Mariners Prediction, Odds & Player Prop Bets Today – MLB, May 14

Seattle Mariners' Ty France looks on during a baseball game against the Texas Rangers, Saturday, Sept. 30, 2023, in Seattle. (AP Photo/Lindsey Wasson)
(AP Photo/Lindsey Wasson)
  • The Mariners are -155 favorites vs the Royals
  • Royals vs Mariners Over / Under today: 7 Runs
  • Royals / Mariners TV Channel: RTNW | BSKC

The Kansas City Royals (+125) visit T-Mobile Park to take on the Seattle Mariners (-150) on Tuesday, May 14, 2024. First pitch is scheduled for 9:40pm EDT in Seattle, WA.

This season, the Royals are 25-18 against the spread (ATS), while the Mariners are 21-21 ATS.

Royals vs Mariners Starting Pitchers Today:

  • Royals starting pitcher: Michael Wacha 2-4, 5.16 ERA
  • Mariners starting pitcher: Logan Gilbert 3-1, 2.96 ERA

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

SpreadOver / UnderMoneyline
Royals+1.5 -160O 7 +100+125
Mariners -1.5 +135U 7 -120-150

Royals vs Mariners Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Tuesday‘s MLB game with 53.4% 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 Royals players for Tuesday‘s game, looking at profitable historical betting trends:

Best Royals Player Prop Bets Today:

  • MJ Melendez has hit the Runs Under in 22 of his last 24 games (+18.95 Units / 49% ROI)
  • MJ Melendez has hit the Hits Under in 18 of his last 24 games (+18.45 Units / 77% ROI)
  • MJ Melendez has hit the Hits Runs and RBIs Under in 20 of his last 24 games (+15.85 Units / 53% ROI)
  • MJ Melendez has hit the Total Bases Under in 19 of his last 24 games (+14.40 Units / 48% ROI)
  • MJ Melendez has hit the Singles Under in 26 of his last 34 games (+12.90 Units / 22% ROI)

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

Best Mariners Player Prop Best Bets Today:

  • Julio Rodriguez has hit the Total Bases Under in 29 of his last 40 games (+15.00 Units / 27% ROI)
  • Jorge Polanco has hit the Hits Runs and RBIs Under in 28 of his last 40 games (+13.50 Units / 27% ROI)
  • Jorge Polanco has hit the Runs Under in 29 of his last 40 games (+12.75 Units / 20% ROI)
  • Josh Rojas has hit the Hits Over in 17 of his last 19 games (+12.55 Units / 34% ROI)
  • Mitch Garver has hit the Home Runs Over in 4 of his last 10 games at home (+10.30 Units / 103% ROI)
  • The Kansas City Royals have hit the Moneyline in 12 of their last 17 games (+13.10 Units / 77% ROI)
  • The Kansas City Royals have hit the Game Total Over in 33 of their last 59 games (+9.10 Units / 14% ROI)
  • The Kansas City Royals have hit the 1st Five Innings (F5) Team Total Over in 11 of their last 16 games (+5.49 Units / 27% ROI)
  • The Kansas City Royals have covered the Run Line in 12 of their last 17 games (+5.00 Units / 22% ROI)
  • The Seattle Mariners have hit the 1st Five Innings (F5) Moneyline in 33 of their last 61 games (+11.71 Units / 13% ROI)
  • The Seattle Mariners have covered the 1st Five Innings (F5) Run Line in 33 of their last 52 games (+11.13 Units / 18% ROI)
  • The Seattle Mariners have hit the Moneyline in 50 of their last 82 games (+8.75 Units / 7% ROI)
  • The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Over in 50 of their last 86 games (+7.14 Units / 7% ROI)
  • The Seattle Mariners have hit the Team Total Under in 9 of their last 11 games at home (+7.10 Units / 60% ROI)

Royals Against the Spread (ATS) Record

Against the spread this season, the Royals are 26-17 against the Run Line (+6.34 Units / 10.65% ROI).

  • 25-18 when betting on the Moneyline for +8.05 Units / 16.18% ROI
  • 16-24 when betting on the total runs Over for -10.5 Units / -22.61% ROI
  • 24-16 when betting on the total runs Under for +6.45 Units / 14.01% ROI

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 21-21 against the Run Line (-2.2 Units / -3.91% ROI).

  • 23-19 when betting on the Moneyline for -0.5 Units / -0.96% ROI
  • 14-26 when betting on the total runs Over for -14.3 Units / -32.06% ROI
  • 26-14 when betting on the total runs Under for +10.2 Units / 22.3% ROI

Mariners vs Royals Home Run Prop Bets Today

Over Under
Cal Raleigh (SEA) 0.5 +290 0.5 -375
Julio Rodriguez (SEA) 0.5 +375 0.5 -550
Salvador Perez (KC) 0.5 +375 0.5 -500
Mitch Haniger (SEA) 0.5 +425 0.5 -600
Luke Raley (SEA) 0.5 +450 0.5 -650

Mariners vs Royals Total Hits Prop Bets Today

Over Under
Bobby Witt Jr. (KC) 0.5 -250 0.5 +190
Josh Rojas (SEA) 0.5 -210 0.5 +160
Maikel Garcia (KC) 0.5 -210 0.5 +160
Salvador Perez (KC) 0.5 -200 0.5 +150
Vinnie Pasquantino (KC) 0.5 -190 0.5 +140

Mariners vs Royals RBI Prop Bets Today

Over Under
Cal Raleigh (SEA) 0.5 +120 0.5 -160
Julio Rodriguez (SEA) 0.5 +145 0.5 -190
Salvador Perez (KC) 0.5 +145 0.5 -190
Vinnie Pasquantino (KC) 0.5 +160 0.5 -210
Mitch Haniger (SEA) 0.5 +165 0.5 -225

Mariners vs Royals Strikeout Prop Bets Today

Over Under
Logan Gilbert (SEA) 5.5 -160 5.5 +125
Michael Wacha (KC) 5.5 -105 5.5 -120

Opponents are hitting .359 (23-for-64) against Michael Wacha when going through the lineup the second time in a game this season — highest among qualified SPs in MLB; League Avg: .227 — first Percentile.

Michael Wacha has thrown his changeup 53% of the time (105/200) with two-strikes this season — highest among among AL Starters; League Avg: 19% — 100th Percentile.

Michael Wacha has recorded 14 of his 23 strikeouts (61%) vs left-handed batters with his changeup this season — highest among qualified SPs in MLB; League Avg: 10% — 100th Percentile.

Michael Wacha has thrown his changeup 53% of the time (105/200) with two-strikes this season — highest among qualified SPs in MLB; League Avg: 17% — 100th Percentile.

Mariners Starting Pitcher Stats & Trends

Logan Gilbert has allowed an OBP of just .243 (358 PA’s) when going through the lineup the second time in a game since last season — 2nd best among qualified SPs in MLB; League Avg: .297 — 97th Percentile.

Opponents are hitting just .133 (4-for-30) against Logan Gilbert on the first pitch of at-bats this season — 2nd best among qualified SPs in MLB; League Avg: .321 — 98th Percentile.

Opponents have a two strike miss rate of 34% (43/125) against Logan Gilbert this season — 3rd best among qualified SPs in MLB; League Avg: 24% — 97th Percentile.

Opponents are hitting just .204 (69-for-339) against Logan Gilbert when going through the lineup the second time in a game since last season — tied for 2nd best among qualified SPs in MLB; League Avg: .242 — 97th Percentile.

Royals Keys to the Game vs. the Mariners

The Royals are just 14-88 (.137) when their opponents score in the first inning since the 2022 season — lowest in MLB; League Avg: .363.

The Royals are just 20-14 (.588) when they’ve had 5 or more XBH since the 2023 season — 2nd lowest in MLB; League Avg: .791.

The Royals are just 3-11 (.214) when tied entering the 8th inning since the 2023 season — lowest in MLB; League Avg: .500.

The Royals are just 21-47 (.309) after a road win since the 2022 season — lowest in MLB; League Avg: .489.

Mariners Keys to the Game vs. the Royals

The Mariners are 93-15 (.861) when they’ve had 10 or more hits since the 2022 season — best in MLB; League Avg: .733.

The Mariners are 158-6 (.963) when leading entering the 8th inning since the 2022 season — best in MLB; League Avg: .906.

The Mariners are 30-4 (.882) when they’ve had 5 or more XBH since the 2023 season — 4th best in MLB; League Avg: .791.

The Mariners are 164-3 (.982) when leading entering the 9th inning since the 2022 season — best in MLB; League Avg: .950.

Royals hitters have an OBP of just .281 (3,704 PA’s) on the road since last season — lowest in MLB; League Avg: .315.

The Royals have won just 51% of games in which they have scored in at least three different innings on the road since the 2022 season — 2nd lowest in MLB; League Avg: 72%.

The Royals have won just 45% of games in which they have scored in at least three different innings on the road since last season — lowest in MLB; League Avg: 71%.

Royals hitters have an OPS of just .646 (3,704 PA’s) on the road since last season — 2nd lowest in MLB; League Avg: .716.

Mariners hitters have 434 strikeouts in 1,531 PA’s (28%) this season — highest in MLB; League Avg: 22%.

Mariners hitters have put just 33% of their swings in play with two-strikes since last season — lowest in MLB; League Avg: 37%.

The Mariners are batting just .125 on pitches out of the zone since last season — 2nd lowest in MLB; League Avg: .152.

The Mariners are batting just .228 at home since the 2022 season — 2nd lowest in MLB; League Avg: .248.

The Royals won just 18% of games in which their opponents scored first in the 2023 season — lowest in MLB; League Avg: 34%.

The Royals won just 17% of home games in which their opponents scored first in the 2023 season — lowest in MLB; League Avg: 37%.

Royals pitchers have a strikeout rate of just 20% since the 2022 season — 4th lowest in MLB; League Avg: 23%.

Royals pitchers have a strikeout rate of just 19% with runners in scoring position since the 2022 season — 2nd lowest in MLB; League Avg: 22%.

Mariners pitchers have a strikeout rate of 46% with two-strikes this season — 2nd best in MLB; League Avg: 42%.

Mariners pitchers have walked 103 of 1,502 batters (7%) this season — tied for best in MLB; League Avg: 9%.

Mariners pitchers have walked 971 of 13,494 batters (7%) since the 2022 season — 3rd best in MLB; League Avg: 8%.

Opponents have a groundball rate of just 38% against Mariners pitchers this season — 3rd lowest in MLB; League Avg: 43%.

Mariners vs. Royals Injuries Tonight That May Affect Prop Bets 

  • Jackson Kowar (Seattle Mariners): Elbow, 60-Day IL
  • Mitch Garver (Seattle Mariners): Back, Day-To-Day
  • Sam Haggerty (Seattle Mariners): Undisclosed, 10-Day IL
  • Gregory Santos (Seattle Mariners): Lat, 15-Day IL
  • Eduard Bazardo (Seattle Mariners): Shoulder, 15-Day IL
  • Bryan Woo (Seattle Mariners): Elbow, 15-Day IL
  • Matt Brash (Seattle Mariners): Elbow, 15-Day IL
  • Kyle Wright (Kansas City Royals): Shoulder, 60-Day IL
  • Austin Cox (Kansas City Royals): Knee, Day-To-Day
  • Michael Massey (Kansas City Royals): Back, 10-Day IL
  • Jake Brentz (Kansas City Royals): Hamstring, 15-Day IL
  • Josh Taylor (Kansas City Royals): Biceps, 15-Day IL
  • Carlos Hernandez (Kansas City Royals): Shoulder, 15-Day IL
  • Kris Bubic (Kansas City Royals): Elbow, 60-Day IL

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About the Author

Shane Jackson

Read More @Sjacksonmgm

Shane Jackson is a Web Content Writer for BetMGM, covering MLB and NBA. After graduating from the University of Kansas, his previous stops include MLB.com, Lawrence Journal-World, Manhattan Mercury, Bet Chicago Sports, WynnBET, and Sportsbook Review.

Shane Jackson is a Web Content Writer for BetMGM, covering MLB and NBA. After graduating from the University of Kansas, his previous stops include MLB.com, Lawrence Journal-World, Manhattan Mercury, Bet Chicago Sports, WynnBET, and Sportsbook Review.