• The Mariners are -135 favorites vs the White Sox
• Mariners vs White Sox Over / Under today: 9.5 Runs
• Mariners / White Sox TV Channel: CHSN | MRTV

The Seattle Mariners (-135) visit Rate Field to take on the Chicago White Sox (+110) on May 9, 2026. First pitch is scheduled for 7:10 pm in Chicago, IL.

This season, the Mariners are 19-20 against the spread (ATS), while the White Sox are 19-18 ATS.

Mariners vs White Sox Starting Pitchers Today:

• Mariners starting pitcher: Luis Castillo 0-3, 6.42 ERA
• White Sox starting pitcher: Anthony Kay 1-1, 5.71 ERA

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

Mariners vs White Sox Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Saturday‘s MLB game with 59.5% confidence, factoring in game simulations, recent player performances, starting pitchers and injuries.

Bet now on Mariners vs White Sox and all games with BetMGM

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

Best Mariners Player Prop Bets Today:

• J.P. Crawford has hit the Home Runs Over in 3 of his last 8 games (+21.00 Units / 262% ROI)
• Cole Young has hit the Walks Under in 14 of his last 15 games (+11.20 Units / 31% ROI)
• Cole Young has hit the Singles Over in 13 of his last 20 games (+9.65 Units / 48% ROI)
• Mitch Garver has hit the Runs Under in 16 of his last 20 away games (+7.80 Units / 19% ROI)
• Cal Raleigh has hit the Hits Under in his last 6 games (+7.70 Units / 128% ROI)

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

Best White Sox Player Prop Best Bets Today:

• Chase Meidroth has hit the Hits Over in 19 of his last 20 games (+17.50 Units / 45% ROI)
• Chase Meidroth has hit the Runs Over in 14 of his last 20 games (+14.65 Units / 73% ROI)
• Chase Meidroth has hit the Hits Runs and RBIs Over in 16 of his last 20 games (+12.65 Units / 58% ROI)
• Chase Meidroth has hit the Total Bases Over in 15 of his last 20 games (+12.35 Units / 45% ROI)
• Miguel Vargas has hit the Walks Over in 16 of his last 25 games (+12.00 Units / 48% ROI)

Mariners Best Bets Today:

• The Seattle Mariners have hit the Team Total Under in 31 of their last 50 away games (+8.35 Units / 14% ROI)
• The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Under in 30 of their last 50 away games (+8.10 Units / 14% ROI)
• The Seattle Mariners have hit the Game Total Over in 23 of their last 40 away games (+5.65 Units / 13% ROI)
• The Seattle Mariners have hit the Moneyline in 6 of their last 7 away games (+4.75 Units / 50% ROI)
• The Seattle Mariners have covered the Run Line in 16 of their last 30 away games (+4.05 Units / 12% ROI)

White Sox Best Bets Today:

• The Chicago White Sox have hit the Team Total Over in 13 of their last 19 games (+6.40 Units / 30% ROI)
• The Chicago White Sox have hit the 1st Five Innings (F5) Team Total Under in 10 of their last 14 games (+6.00 Units / 36% ROI)
• The Chicago White Sox have covered the Run Line in 12 of their last 19 games (+4.95 Units / 18% ROI)
• The Chicago White Sox have hit the Moneyline in 11 of their last 19 games (+4.55 Units / 22% ROI)
• The Chicago White Sox have covered the 1st Five Innings (F5) Run Line in 29 of their last 50 games at home (+3.85 Units / 6% ROI)

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 14-25 against the Run Line (-8.4 Units / -20.17% ROI).

• 19-20 when betting on the Moneyline for -7.7 Units / -14.1% ROI
• 18-20 when betting on the total runs Over for -3.95 Units / -9.2% ROI
• 20-18 when betting on the total runs Under for +0.3 Units / 0.7% ROI

White Sox Against the Spread (ATS) Record

Against the spread this season, the White Sox are 19-18 against the Run Line (-6 Units / -10.93% ROI).

• 17-21 when betting on the Moneyline for +0.05 Units / 0.13% ROI
• 21-17 when betting on the total runs Over for +2.45 Units / 5.89% ROI
• 17-21 when betting on the total runs Under for -6.15 Units / -14.64% ROI

White Sox vs Mariners Home Run Prop Bets Today

White Sox vs Mariners Total Hits Prop Bets Today

White Sox vs Mariners Strikeout Prop Bets Today

Mariners Keys to the Game vs. the White Sox

The Mariners are 14-69 (.169) when trailing entering the 7th inning since the 2025 season — tied for 4th best in MLB; League Avg: .127.

The Mariners are 6-76 (.073) when trailing entering the 9th inning since the 2025 season — 3rd best in MLB; League Avg: .045.

The Mariners are 23-14 (.622) when tied entering the 7th inning since the 2025 season — 3rd best in MLB; League Avg: .500.

The Mariners are 83-5 (.943) when leading entering the 8th inning since the 2025 season — tied for 4th best in MLB; League Avg: .906.

White Sox Keys to the Game vs. the Mariners

The White Sox are just 12-4 (.750) when leading entering the 7th inning this season — 5th lowest in MLB; League Avg: .862.

The White Sox are just 2-6 (.250) when their opponents score in the first inning this season — tied for 4th lowest in MLB; League Avg: .372.

The White Sox are just 59-18 (.766) when leading entering the 7th inning since the 2025 season — lowest in MLB; League Avg: .873.

The White Sox are just 22-106 (.172) when scoring 4 or fewer runs since the 2025 season — lowest in MLB; League Avg: .284.

Mariners Hitting Stats & Trends

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

Mariners hitters are slugging just .173 on pitches out of the zone this season — 3rd lowest in MLB.

The Mariners are batting .300 when facing the starting pitcher for the 3rd time in a game this season — 2nd best in MLB.

The Mariners are batting just .222 on the road this season — 5th lowest in MLB.

White Sox Hitting Stats & Trends

The White Sox are batting just .150 against division opponents this season — lowest in MLB.

White Sox hitters are slugging just .368 against RHP this season — 5th lowest in MLB.

White Sox hitters have missed on 29% of swings this season — highest in MLB.

White Sox hitters are slugging just .351 at home this season — 5th lowest in MLB.

Mariners Pitching Stats & Trends

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

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

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 walked 6% of batters when facing the leadoff batter in the inning this season — 2nd best in MLB.

White Sox Pitching Stats & Trends

White Sox pitchers have walked 12% of batters when facing the leadoff batter in the inning this season — highest in MLB.

Opponents have a miss rate of just 23% against White Sox pitchers this season — 4th lowest in MLB.

White Sox pitchers have a strikeout rate of just 39% with two-strikes this season — 3rd lowest in MLB.

White Sox pitchers have a strikeout rate of just 13% when going through the lineup the third time in a game this season — 2nd lowest in MLB.

More MLB Reading:

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

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