Mariners vs Blue Jays Prediction, Odds & Player Prop Bets Today – MLB, Oct 20

Toronto Blue Jays' Alejandro Kirk bats during a baseball game against the Tampa Bay Rays Saturday, Sept. 21, 2024, in St. Petersburg, Fla.
(AP Photo/Steve Nesius)
  • The Blue Jays are -130 favorites vs the Mariners
  • Mariners vs Blue Jays Over / Under today: 7.5 Runs
  • Mariners / Blue Jays TV Channel: FOX | FS1

The Seattle Mariners (110) visit Rogers Centre to take on the Toronto Blue Jays (-130) on Monday, October 20, 2025. First pitch is scheduled for 8:10pm EDT in Toronto, ON.

This season, the Mariners are 96-77 against the spread (ATS), while the Blue Jays are 97-73 ATS.

Mariners vs Blue Jays Starting Pitchers Today:

  • Mariners starting pitcher: George Kirby 10-9, 4.50 ERA
  • Blue Jays starting pitcher: Shane Bieber 5-2, 3.68 ERA

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

SpreadOver / UnderMoneyline
Mariners+1.5 -185O 7.5 -105110
Blue Jays -1.5 155U 7.5 -115-130

Mariners vs Blue Jays Prediction for Today’s Game

Based on recent trends the model predicts the Blue Jays will win Monday‘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 Mariners players for Monday‘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 10 away games (+25.50 Units / 255% ROI)
  • Josh Naylor has hit the Singles Over in 15 of his last 20 games (+10.60 Units / 49% ROI)
  • Josh Naylor has hit the Total Bases Over in 11 of his last 15 away games (+9.15 Units / 50% ROI)
  • Eugenio Suarez has hit the Hits Over in his last 8 away games (+8.00 Units / 65% ROI)
  • Josh Naylor has hit the Hits Runs and RBIs Over in 14 of his last 20 games (+7.65 Units / 33% ROI)

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

Best Blue Jays Player Prop Best Bets Today:

  • Andres Gimenez has hit the Home Runs Over in 2 of his last 4 games (+24.00 Units / 600% ROI)
  • George Springer has hit the Walks Over in 8 of his last 9 games at home (+10.80 Units / 120% ROI)
  • Ernie Clement has hit the Hits Runs and RBIs Over in 15 of his last 20 games at home (+10.50 Units / 50% ROI)
  • Vladimir Guerrero Jr has hit the Total Bases Under in 19 of his last 25 games at home (+10.10 Units / 29% ROI)
  • Ernie Clement has hit the Runs Over in 11 of his last 20 games at home (+9.80 Units / 49% ROI)
  • The Seattle Mariners have hit the Game Total Over in 92 of their last 161 games (+20.75 Units / 12% ROI)
  • The Seattle Mariners have hit the Moneyline in 23 of their last 32 games (+12.20 Units / 24% ROI)
  • The Seattle Mariners have covered the 1st Five Innings (F5) Run Line in 27 of their last 43 games (+8.65 Units / 17% ROI)
  • The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Under in 28 of their last 47 away games (+8.40 Units / 15% ROI)
  • The Seattle Mariners have covered the Run Line in 20 of their last 32 games (+8.30 Units / 21% ROI)
  • The Toronto Blue Jays have hit the Game Total Over in 82 of their last 140 games (+25.00 Units / 16% ROI)
  • The Toronto Blue Jays have hit the Moneyline in 84 of their last 136 games (+23.94 Units / 13% ROI)
  • The Toronto Blue Jays have covered the Run Line in 97 of their last 171 games (+23.80 Units / 11% ROI)
  • The Toronto Blue Jays have hit the Team Total Over in 70 of their last 117 games (+17.15 Units / 12% ROI)
  • The Toronto Blue Jays have hit the 1st Five Innings (F5) Team Total Over in 11 of their last 13 games (+8.50 Units / 53% ROI)

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 75-95 against the Run Line (-20.05 Units / -9.68% ROI).

  • 96-77 when betting on the Moneyline for +2.05 Units / 0.86% ROI
  • 95-72 when betting on the total runs Over for +16.05 Units / 8.44% ROI
  • 72-95 when betting on the total runs Under for -32.42 Units / -17.01% ROI

Blue Jays Against the Spread (ATS) Record

Against the spread this season, the Blue Jays are 97-73 against the Run Line (+22.8 Units / 10.12% ROI).

  • 100-72 when betting on the Moneyline for +19.74 Units / 9.01% ROI
  • 94-72 when betting on the total runs Over for +15.45 Units / 8.17% ROI
  • 72-94 when betting on the total runs Under for -30.65 Units / -16.19% ROI

Blue Jays vs Mariners Home Run Prop Bets Today

Over Under
Cal Raleigh (SEA) 0.5 +270 0.5 -325
Vladimir Guerrero Jr. (TOR) 0.5 +310 0.5 -400
Eugenio Suarez (SEA) 0.5 +425 0.5 -600
George Springer (TOR) 0.5 +425 0.5 -625
Julio Rodriguez (SEA) 0.5 +475 0.5 -650

Blue Jays vs Mariners Total Hits Prop Bets Today

Over Under
Ernie Clement (TOR) 0.5 -275 0.5 +200
Alejandro Kirk (TOR) 0.5 -275 0.5 +200
Julio Rodriguez (SEA) 0.5 -250 0.5 +185
Josh Naylor (SEA) 0.5 -210 0.5 +160
Nathan Lukes (TOR) 0.5 -190 0.5 +145

Blue Jays vs Mariners RBI Prop Bets Today

Over Under
Vladimir Guerrero Jr. (TOR) 0.5 +130 0.5 -175
Cal Raleigh (SEA) 0.5 +140 0.5 -185
Alejandro Kirk (TOR) 0.5 +155 0.5 -210
George Springer (TOR) 0.5 +175 0.5 -235
Julio Rodriguez (SEA) 0.5 +180 0.5 -250

Blue Jays vs Mariners Strikeout Prop Bets Today

Over Under
Shane Bieber (TOR) 4.5 -150 4.5 +115
George Kirby (SEA) 3.5 +125 3.5 -160

Mariners hitters slugged .712 on the first pitch of at-bats this season — best in MLB; League Avg: .577.

The Mariners batted just .207 when facing the starting pitcher for the 3rd time in a game in the 2024 season — lowest in MLB; League Avg: .263.

Mariners hitters had an OPS of .776 (3,230 PA’s) on the road this season — 2nd best in MLB; League Avg: .709.

Mariners hitters slugged just .324 when facing the starting pitcher for the 3rd time in a game in the 2024 season — lowest in MLB; League Avg: .437.

Blue Jays Starting Pitcher Stats & Trends

Blue Jays hitters struck out in just 18% of their PA’s this season — best in MLB; League Avg: 22%.

The Blue Jays batted .185 on pitches out of the zone this season — best in MLB; League Avg: .147.

Blue Jays hitters struck out in just 19% of their PA’s against LHP this season — 2nd best in MLB; League Avg: 23%.

Blue Jays hitters struck out in just 17% of their PA’s against RHP this season — 2nd best in MLB; League Avg: 22%.

Mariners Keys to the Game vs. the Blue Jays

Mariners hitters slugged .712 on the first pitch of at-bats this season — best in MLB; League Avg: .577.

The Mariners batted just .207 when facing the starting pitcher for the 3rd time in a game in the 2024 season — lowest in MLB; League Avg: .263.

Mariners hitters had an OPS of .776 (3,230 PA’s) on the road this season — 2nd best in MLB; League Avg: .709.

Mariners hitters slugged just .324 when facing the starting pitcher for the 3rd time in a game in the 2024 season — lowest in MLB; League Avg: .437.

Blue Jays Keys to the Game vs. the Mariners

Blue Jays hitters struck out in just 18% of their PA’s this season — best in MLB; League Avg: 22%.

The Blue Jays batted .185 on pitches out of the zone this season — best in MLB; League Avg: .147.

Blue Jays hitters struck out in just 19% of their PA’s against LHP this season — 2nd best in MLB; League Avg: 23%.

Blue Jays hitters struck out in just 17% of their PA’s against RHP this season — 2nd best in MLB; League Avg: 22%.

Mariners hitters slugged .712 on the first pitch of at-bats this season — best in MLB; League Avg: .577.

The Mariners batted just .207 when facing the starting pitcher for the 3rd time in a game in the 2024 season — lowest in MLB; League Avg: .263.

Mariners hitters had an OPS of .776 (3,230 PA’s) on the road this season — 2nd best in MLB; League Avg: .709.

Mariners hitters slugged just .324 when facing the starting pitcher for the 3rd time in a game in the 2024 season — lowest in MLB; League Avg: .437.

Blue Jays hitters struck out in just 18% of their PA’s this season — best in MLB; League Avg: 22%.

The Blue Jays batted .185 on pitches out of the zone this season — best in MLB; League Avg: .147.

Blue Jays hitters struck out in just 19% of their PA’s against LHP this season — 2nd best in MLB; League Avg: 23%.

Blue Jays hitters struck out in just 17% of their PA’s against RHP this season — 2nd best in MLB; League Avg: 22%.

Mariners hitters slugged .712 on the first pitch of at-bats this season — best in MLB; League Avg: .577.

The Mariners batted just .207 when facing the starting pitcher for the 3rd time in a game in the 2024 season — lowest in MLB; League Avg: .263.

Mariners hitters had an OPS of .776 (3,230 PA’s) on the road this season — 2nd best in MLB; League Avg: .709.

Mariners hitters slugged just .324 when facing the starting pitcher for the 3rd time in a game in the 2024 season — lowest in MLB; League Avg: .437.

Blue Jays hitters struck out in just 18% of their PA’s this season — best in MLB; League Avg: 22%.

The Blue Jays batted .185 on pitches out of the zone this season — best in MLB; League Avg: .147.

Blue Jays hitters struck out in just 19% of their PA’s against LHP this season — 2nd best in MLB; League Avg: 23%.

Blue Jays hitters struck out in just 17% of their PA’s against RHP this season — 2nd best in MLB; League Avg: 22%.

More MLB Reading:


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The content provided in this blog is intended for entertainment purposes only. All views and opinions expressed are the authors and reflect their individual perspectives on sports, betting, and related topics. This content should not be considered professional betting advice or the official views of BetMGM LLC. Please gamble responsibly. If you or someone you know is experiencing issues related to gambling, seek help from a licensed health professional. This blog is not liable for any losses, damages, or consequences resulting from betting activities.

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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.