• The Mariners are -145 favorites vs the Royals
• Royals vs Mariners Over / Under today: 7.5 Runs
• Royals / Mariners TV Channel: RYTV | MRTV

The Kansas City Royals (+118) visit T-Mobile Park to take on the Seattle Mariners (-145) on May 2, 2026. First pitch is scheduled for 9:40 pm in Seattle, WA.

This season, the Royals are 13-19 against the spread (ATS), while the Mariners are 12-21 ATS.

Royals vs Mariners Starting Pitchers Today:

• Royals starting pitcher: Seth Lugo 1-1, 2.65 ERA
• Mariners starting pitcher: Emerson Hancock 2-1, 2.91 ERA

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

Royals vs Mariners Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Saturday‘s MLB game with 56.4% 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 Saturday‘s game, looking at profitable historical betting trends:

Best Royals Player Prop Bets Today:

• Vinnie Pasquantino has hit the Home Runs Over in 3 of his last 6 away games (+13.00 Units / 217% ROI)
• Salvador Perez has hit the Hits Under in 12 of his last 20 away games (+10.65 Units / 50% ROI)
• Vinnie Pasquantino has hit the Singles Under in 16 of his last 20 games (+10.15 Units / 39% ROI)
• Isaac Collins has hit the Runs Under in his last 10 away games (+10.00 Units / 44% ROI)
• Salvador Perez has hit the Hits Runs and RBIs Under in 17 of his last 25 games (+8.60 Units / 30% ROI)

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

Best Mariners Player Prop Best Bets Today:

• Cole Young has hit the Singles Over in 11 of his last 15 games at home (+12.80 Units / 85% ROI)
• Julio Rodriguez has hit the Hits Over in his last 10 games at home (+10.90 Units / 54% ROI)
• Cole Young has hit the Walks Under in his last 10 games (+10.00 Units / 45% ROI)
• Cal Raleigh has hit the Home Runs Over in 5 of his last 10 games (+9.80 Units / 98% ROI)
• Josh Naylor has hit the Runs Under in 19 of his last 25 games (+9.05 Units / 21% ROI)

Royals Best Bets Today:

• The Kansas City Royals have hit the 1st Five Innings (F5) Team Total Under in 13 of their last 16 away games (+9.95 Units / 53% ROI)
• The Kansas City Royals have hit the Game Total Under in 14 of their last 19 away games (+8.45 Units / 40% ROI)
• The Kansas City Royals have hit the Team Total Under in 13 of their last 19 away games (+5.95 Units / 27% ROI)
• The Kansas City Royals have hit the Moneyline in 5 of their last 7 games (+3.15 Units / 41% ROI)
• The Kansas City Royals have covered the Run Line in 5 of their last 7 games (+2.65 Units / 26% ROI)

Mariners Best Bets Today:

• The Seattle Mariners have hit the Moneyline in 34 of their last 50 games at home (+11.80 Units / 14% ROI)
• The Seattle Mariners have hit the Team Total Over in 31 of their last 50 games at home (+10.50 Units / 18% ROI)
• The Seattle Mariners have hit the 1st Five Innings (F5) Moneyline in 29 of their last 50 games at home (+10.20 Units / 12% ROI)
• The Seattle Mariners have hit the Game Total Over in 29 of their last 50 games at home (+7.25 Units / 13% ROI)
• The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Over in 30 of their last 50 games at home (+6.95 Units / 11% ROI)

Royals Against the Spread (ATS) Record

Against the spread this season, the Royals are 14-17 against the Run Line (-7.1 Units / -15.97% ROI).

• 13-19 when betting on the Moneyline for -8.75 Units / -22.58% ROI
• 14-18 when betting on the total runs Over for -5.65 Units / -16.01% ROI
• 18-14 when betting on the total runs Under for +2.85 Units / 8.12% ROI

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 12-21 against the Run Line (-6.75 Units / -19.2% ROI).

• 16-17 when betting on the Moneyline for -6.9 Units / -14.78% ROI
• 16-16 when betting on the total runs Over for -1.5 Units / -4.13% ROI
• 16-16 when betting on the total runs Under for -1.45 Units / -3.99% ROI

Mariners vs Royals Home Run Prop Bets Today

Mariners vs Royals Total Hits Prop Bets Today

Mariners vs Royals Strikeout Prop Bets Today

Royals Keys to the Game vs. the Mariners

The Royals are just 10-4 (.714) when leading entering the 8th inning this season — lowest in MLB; League Avg: .889.

The Royals are just 4-12 (.250) on the road this season — 2nd lowest in MLB; League Avg: .468.

The Royals are just 1-9 (.100) when allowing 10 or more hits this season — 4th lowest in MLB; League Avg: .242.

The Royals are just 5-77 (.061) when trailing entering the 8th inning since the 2025 season — 4th lowest in MLB; League Avg: .094.

Mariners Keys to the Game vs. the Royals

The Mariners are just 2-7 (.222) vs bottom 10 scoring offenses this season Today, they face the Royals (23rd in runs scored).

The Mariners are 49-29 (.628) vs the bottom 10 runs allowed teams since the 2025 season Today, they face the Royals (21st runs allowed).

The Mariners are 14-68 (.171) when trailing entering the 7th inning since the 2025 season — 5th best in MLB; League Avg: .128.

The Mariners are 6-75 (.074) when trailing entering the 9th inning since the 2025 season — 3rd best in MLB; League Avg: .045.

Royals Hitting Stats & Trends

Royals hitters have an OPS of 1.350 (232 PA’s) with the pitcher behind in the count this season — best in MLB.

The Royals are batting just .207 on the road this season — 2nd lowest in MLB.

34% of Royals hitters strikeouts have come on 95+ MPH fastballs this season — highest in MLB.

Royals hitters are slugging .800 with the pitcher behind in the count this season — best in MLB.

Mariners Hitting Stats & Trends

Mariners hitters are slugging .679 on the first pitch of at-bats since the 2025 season — 2nd best in MLB.

The Mariners are batting just .205 against LHP this season — 3rd lowest in MLB.

Mariners hitters are slugging just .335 on the road this season — tied for 2nd lowest in MLB.

Mariners hitters have an OBP of .374 (123 PA’s) when facing the starting pitcher for the 3rd time in a game this season — 3rd best in MLB.

Royals Pitching Stats & Trends

Opponents have a groundball rate of just 37% against Royals pitchers this season — lowest in MLB.

Royals pitchers have picked-off 7 runners from first base this season — tied for most in MLB.

Opponents have a groundball rate of just 31% against Royals pitchers over the past seven days (6 games) — lowest in MLB.

Royals pitchers have walked 12% of batters this season — 3rd highest in MLB.

Mariners Pitching Stats & Trends

Mariners pitchers have thrown at least two strikes in their first three pitches to 71% of opposing batters this season — highest in MLB.

Mariners pitchers have a first-pitch strike rate of 68% this season — highest in MLB.

Mariners pitchers have induced opposing hitters to ground into 33 double plays in 232 opportunities (14%) this season — best in MLB.

Mariners pitchers have walked 6% of batters when facing the leadoff batter in the inning since the 2025 season — 2nd best in MLB.

More MLB Reading:

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

Bet now on Royals vs Mariners and all games with BetMGM

Bet on MLB Odds at BetMGM

Sportsbook promos are always available at BetMGM. For new customers, check out the sportsbook welcome offer and BetMGM Refer a Friend. For existing customers, there are Odds Boosts, Parlay Boosts, contests and more.