Royals vs Mariners Prediction, Odds & Player Prop Bets Today – MLB, May 13

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Seattle Mariners' Julio Rodriguez watches his home run during the eighth inning of a baseball game against the San Diego Padres, Tuesday, June 6, 2023, in San Diego. (AP Photo/Gregory Bull)
(AP Photo/Gregory Bull)
BetMGM Betting @BETMGM May 13, 2024, 11:00 AM
  • The Mariners are -150 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 Monday, May 13, 2024. First pitch is scheduled for 9:40pm EDT in Seattle, WA.

This season, the Royals are 25-17 against the spread (ATS), while the Mariners are 20-21 ATS.

Royals vs Mariners Starting Pitchers Today:

  • Royals starting pitcher: Brady Singer 3-1, 2.38 ERA
  • Mariners starting pitcher: George Kirby 3-3, 3.71 ERA

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

SpreadOver / UnderMoneyline
Royals+1.5 -175O 7 -110+125
Mariners -1.5 +145U 7 -110-150

Royals vs Mariners Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Monday‘s MLB game with 55.3% confidence, factoring in game simulations, recent player performances, starting pitchers and injuries.


Bet now on Royals vs Mariners and all games with BetMGM


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

Best Royals Player Prop Bets Today:

  • MJ Melendez has hit the Runs Under in 21 of his last 23 games (+17.95 Units / 49% ROI)
  • MJ Melendez has hit the Hits Under in 17 of his last 23 games (+17.40 Units / 76% ROI)
  • MJ Melendez has hit the RBIs Under in his last 16 games (+16.00 Units / 41% ROI)
  • MJ Melendez has hit the Hits Runs and RBIs Under in 19 of his last 23 games (+14.50 Units / 50% ROI)
  • MJ Melendez has hit the Total Bases Under in 18 of his last 23 games (+13.35 Units / 46% ROI)

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

Best Mariners Player Prop Best Bets Today:

  • Jorge Polanco has hit the Hits Runs and RBIs Under in 28 of his last 39 games (+14.80 Units / 30% ROI)
  • Jorge Polanco has hit the Runs Under in 29 of his last 39 games (+14.35 Units / 24% ROI)
  • Julio Rodriguez has hit the Total Bases Under in 28 of his last 39 games (+14.00 Units / 26% ROI)
  • Josh Rojas has hit the Hits Over in 16 of his last 18 games (+11.55 Units / 33% ROI)
  • Mitch Garver has hit the Home Runs Over in 4 of his last 9 games at home (+11.30 Units / 126% 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 26-16 against the Run Line (+8.04 Units / 13.9% ROI).

  • 25-17 when betting on the Moneyline for +9.05 Units / 18.56% ROI
  • 15-24 when betting on the total runs Over for -11.5 Units / -25.36% ROI
  • 24-15 when betting on the total runs Under for +7.55 Units / 16.8% ROI

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 20-21 against the Run Line (-3.7 Units / -6.7% ROI).

  • 22-19 when betting on the Moneyline for -1.5 Units / -2.95% ROI
  • 13-26 when betting on the total runs Over for -15.3 Units / -35.17% ROI
  • 26-13 when betting on the total runs Under for +11.3 Units / 25.31% ROI

Mariners vs Royals Home Run Prop Bets Today

Over Under
Cal Raleigh (SEA) 0.5 +360 0.5 -500
Salvador Perez (KC) 0.5 +400 0.5 -550
Bobby Witt Jr. (KC) 0.5 +400 0.5 -550
Vinnie Pasquantino (KC) 0.5 +475 0.5 -650
MJ Melendez (KC) 0.5 +475 0.5 -650

Mariners vs Royals Total Hits Prop Bets Today

Over Under
Salvador Perez (KC) 0.5 -250 0.5 +180
Maikel Garcia (KC) 0.5 -250 0.5 +195
Josh Rojas (SEA) 0.5 -225 0.5 +160
Vinnie Pasquantino (KC) 0.5 -190 0.5 +145
Mitch Haniger (SEA) 0.5 -185 0.5 +140

Mariners vs Royals RBI Prop Bets Today

Over Under
Salvador Perez (KC) 0.5 +130 0.5 -165
Bobby Witt Jr. (KC) 0.5 +150 0.5 -200
Vinnie Pasquantino (KC) 0.5 +155 0.5 -210
Julio Rodriguez (SEA) 0.5 +155 0.5 -200
Cal Raleigh (SEA) 0.5 +155 0.5 -210

Mariners vs Royals Strikeout Prop Bets Today

Over Under
Brady Singer (KC) 6.5 +105 6.5 -140
George Kirby (SEA) 5.5 +115 5.5 -155

Brady Singer has walked 11 of 72 batters (15%) when going through the lineup the first time in a game this season — 4th highest among qualified SPs in MLB; League Avg: 8% — fourth Percentile.

Opponents have a groundball rate of 64% (45/70) against Brady Singer in non-two strike counts this season — highest among qualified SPs in MLB; League Avg: 42% — 100th Percentile.

Opposing hitters have a groundball rate of 69% (18/26) against Brady Singer when he’s behind in the count this season — highest among qualified SPs in MLB; League Avg: 40% — 100th Percentile.

Opponents are hitting just .188 (31-for-165) against Brady Singer this season — 10th best among qualified SPs in MLB; League Avg: .234 — 90th Percentile.

Mariners Starting Pitcher Stats & Trends

George Kirby has walked 18 of 565 batters (3%) when going through the lineup the second time in a game since the 2022 season — best among qualified SPs in MLB; League Avg: 7% — 100th Percentile.

George Kirby has allowed an OBP of just .244 (348 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.

George Kirby has walked 9 of 349 batters (3%) when going through the lineup the second time in a game since last season — best among qualified SPs in MLB; League Avg: 7% — 100th Percentile.

George Kirby has walked 1 of 83 right-handed batters (1%) this season — tied for 2nd best among qualified SPs in MLB; League Avg: 7% — 98th 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: .364.

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 10-47 (.175) when their opponents score in the first inning since the 2023 season — lowest in MLB; League Avg: .384.

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: .790.

Mariners Keys to the Game vs. the Royals

The Mariners are 157-6 (.963) when leading entering the 8th inning since the 2022 season — best in MLB; League Avg: .906.

The Mariners are 92-15 (.860) when they’ve had 10 or more hits since the 2022 season — best in MLB; League Avg: .733.

The Mariners are 48-6 (.889) when they’ve had 5 or more XBH since the 2022 season — best in MLB; League Avg: .796.

The Mariners are 34-36 (.486) after a win as underdogs since the 2022 season — 5th best in MLB; League Avg: .414.

team hitters – away

team hitters – home

team pitchers – away

team pitchers – home

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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Our BetMGM betting authors are experts who focus on individual game matchups & player prop bets with an emphasis on betting odds, lines & predictions.

Our BetMGM betting authors are experts who focus on individual game matchups & player prop bets with an emphasis on betting odds, lines & predictions.