Mariners vs Blue Jays Prediction, Odds & Player Prop Bets Today – MLB, Apr 8

Toronto Blue Jays' Vladimir Guerrero Jr. plays against the Boston Red Sox during the fourth inning of a baseball game, Thursday, May 4, 2023, in Boston.
(AP Photo/Michael Dwyer)
  • The Mariners are +100 favorites vs the Blue Jays
  • Mariners vs Blue Jays Over / Under today: 8 Runs
  • Mariners / Blue Jays TV Channel: RTNW | RSN | MLBN

The Seattle Mariners (+100) visit Rogers Centre to take on the Toronto Blue Jays (-120) on Monday, April 8, 2024. First pitch is scheduled for 7:07pm EDT in Toronto, ON.

This season, the Mariners are 4-6 against the spread (ATS), while the Blue Jays are 5-5 ATS.

Mariners vs Blue Jays Starting Pitchers Today:

  • Mariners starting pitcher: Luis Castillo 0-2, 6.55 ERA
  • Blue Jays starting pitcher: Jose Berrios 1-0, 2.38 ERA

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

SpreadOver / UnderMoneyline
Mariners-1.5 +160O 8 +100+100
Blue Jays +1.5 -210U 8 -120-120

Mariners vs Blue Jays Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Monday‘s MLB game with 51.4% 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:

  • George Kirby has hit the Pitching Outs Over in 22 of his last 31 games (+10.30 Units / 23% ROI)
  • Luis Castillo has hit the Earned Runs Over in 16 of his last 23 games (+9.35 Units / 33% ROI)
  • Mitch Garver has hit the Singles Over in 13 of his last 23 away games (+6.95 Units / 30% ROI)
  • Julio Rodriguez has hit the Total Bases Under in 8 of his last 9 games (+6.90 Units / 56% ROI)
  • Jorge Polanco has hit the Singles Over in 6 of his last 8 away games (+6.70 Units / 79% 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:

  • George Springer has hit the Runs Under in 12 of his last 13 games at home (+10.85 Units / 61% ROI)
  • Jose Berrios has hit the Earned Runs Under in 22 of his last 32 games (+9.05 Units / 21% ROI)
  • Jose Berrios has hit the Pitching Outs Over in 21 of his last 31 games (+8.60 Units / 21% ROI)
  • Davis Schneider has hit the Singles Under in 10 of his last 11 games at home (+8.45 Units / 42% ROI)
  • Bo Bichette has hit the Singles Under in 11 of his last 18 games at home (+8.20 Units / 46% ROI)
  • The Seattle Mariners have hit the 1st Five Innings (F5) Moneyline in 24 of their last 40 away games (+12.89 Units / 24% ROI)
  • The Seattle Mariners have covered the 1st Five Innings (F5) Run Line in 28 of their last 42 away games (+12.17 Units / 25% ROI)
  • The Seattle Mariners have hit the Game Total Over in 18 of their last 26 away games (+10.55 Units / 37% ROI)
  • The Seattle Mariners have hit the Moneyline in 27 of their last 43 away games (+9.35 Units / 16% ROI)
  • The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Over in 25 of their last 40 away games (+8.69 Units / 19% ROI)
  • The Toronto Blue Jays have hit the Team Total Under in 40 of their last 66 games at home (+12.34 Units / 16% ROI)
  • The Toronto Blue Jays have hit the Game Total Under in 61 of their last 111 games (+11.50 Units / 9% ROI)
  • The Toronto Blue Jays have hit the 1st Five Innings (F5) Team Total Under in 18 of their last 26 games (+9.66 Units / 31% ROI)
  • The Toronto Blue Jays have hit the 1st Five Innings (F5) Moneyline in 4 of their last 9 games at home (+1.85 Units / 15% ROI)
  • The Toronto Blue Jays have covered the Run Line in 2 of their last 4 games at home (+0.05 Units / 1% ROI)

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 3-7 against the Run Line (-4.65 Units / -35.5% ROI).

  • 4-6 when betting on the Moneyline for -3.3 Units / -26.83% ROI
  • 5-4 when betting on the total runs Over for +0.75 Units / 6.91% ROI
  • 4-5 when betting on the total runs Under for -1.6 Units / -14.29% ROI

Blue Jays Against the Spread (ATS) Record

Against the spread this season, the Blue Jays are 5-5 against the Run Line (-2.7 Units / -16.98% ROI).

  • 4-6 when betting on the Moneyline for -1.2 Units / -11.71% ROI
  • 6-4 when betting on the total runs Over for +1.6 Units / 14.48% ROI
  • 4-6 when betting on the total runs Under for -2.65 Units / -24.09% ROI

Blue Jays vs Mariners Home Run Prop Bets Today

Over Under
Varsho 0.5 +425 0.5 -600
Springer 0.5 +700 0.5 -1100
Biggio 0.5 +775 0.5 -1400
Kiermaier 0.5 +900 0.5 -1600
Kirk 0.5 +950 0.5 -2000

Blue Jays vs Mariners Strikeout Prop Bets Today

Over Under
Berrios 6.5 +115 6.5 -155
Castillo 5.5 +115 5.5 -150

Luis Castillo has allowed an OPS of 1.288 (34 PA’s) vs left-handed batters this season — 2nd highest among in AL; League Avg: .671 — fourth Percentile.

Luis Castillo has thrown fastballs 78% of the time (39/50) on the first pitch of at-bats this season — highest among in AL; League Avg: 48% — 100th Percentile.

Opponents are hitting .286 (8-for-28) against Luis Castillo with two-strikes this season — 4th highest among qualified SPs in MLB; League Avg: .162 — fifth Percentile.

Luis Castillo has allowed an OPS of 1.288 (34 PA’s) vs left-handed batters this season — 5th highest among qualified SPs in MLB; League Avg: .711 — fifth Percentile.

Blue Jays Starting Pitcher Stats & Trends

Jose Berrios has allowed an OPS of .967 (24 PA’s) with two-strikes this season — 2nd highest among qualified SPs in MLB; League Avg: .488 — second Percentile.

Jose Berrios has thrown his curveball 31% of the time (15/48) when he’s behind in the count this season — 3rd highest among qualified SPs in MLB; League Avg: 10% — 96th Percentile.

Jose Berrios has allowed an OPS of .967 (24 PA’s) with two-strikes this season — 2nd highest among in AL; League Avg: .461 — third Percentile.

Jose Berrios attempted to pick off a runner at second base 17 timesin the 2023 season — most among qualified SPs in MLB — 100th Percentile.

Mariners Keys to the Game vs. the Blue Jays

The Mariners are 44-6 (.880) when they’ve had 5 or more XBH since the 2022 season — best in MLB; League Avg: .797.

The Mariners are 10-132 (.070) when trailing entering the 9th inning since the 2022 season — tied for 5th best in MLB; League Avg: .048.

The Mariners are 142-6 (.959) when leading entering the 8th inning since the 2022 season — best in MLB; League Avg: .906.

The Mariners were 13-9 (.591) after a win as underdogs in 2023 — 2nd best in MLB; League Avg: .430.

Blue Jays Keys to the Game vs. the Mariners

The Blue Jays are 162-38 (.806) when allowing 4 or fewer runs since the 2022 season — 3rd best in MLB; League Avg: .717.

The Blue Jays are 71-110 (.390) when scoring 4 or fewer runs since the 2022 season — best in MLB; League Avg: .281.

The Blue Jays were just 9-54 (.143) when they allowed 5 or more runs in 2023 — 2nd lowest in MLB; League Avg: .219.

The Blue Jays were 34-55 (.382) when they scored 4 or fewer runs in 2023 — best in MLB; League Avg: .267.

The Mariners are batting just .150 with two outs this season — 2nd lowest in MLB; League Avg: .220.

Mariners hitters struck out 422 times in 1,624 PA’s (26%) against LHP in the 2023 season — highest in MLB; League Avg: 23%.

The Mariners batted just .125 on pitches out of the zone in the 2023 season — 2nd lowest in MLB; League Avg: .151.

Mariners hitters have put 61% of their swings in play in lefty-lefty matchups this season — highest in MLB; League Avg: 37%.

Blue Jays hitters have an OBP of .335 (2,730 PA’s) against LHP since the 2022 season — 2nd best in MLB; League Avg: .319.

The Blue Jays are batting .264 against LHP since the 2022 season — tied for 2nd best in MLB; League Avg: .249.

The Blue Jays batted just .240 when facing the starting pitcher for the 3rd time in a game in the 2023 season — 2nd lowest in MLB; League Avg: .267.

Blue Jays hitters have put 44% of their swings in play against LHP this season — 2nd highest in MLB; League Avg: 36%.

Mariners pitchers have walked 449 of 6,388 batters (7%) since last season — 2nd best in MLB; League Avg: 9%.

Mariners pitchers have walked 198 of 2,994 batters (7%) when facing the leadoff batter in the inning since the 2022 season — 3rd best in MLB; League Avg: 8%.

Mariners pitchers walked 421 of 6,006 batters (7%) in the 2023 season — 2nd best in MLB; League Avg: 9%.

Opponents had a swing rate of 50% against the Mariners pitchers in the 2023 season — highest in MLB; League Avg: 48%.

Opponents have a miss rate of just 21% against Blue Jays pitchers this season — lowest in MLB; League Avg: 26%.

Blue Jays pitchers have a strikeout rate of just 20% this season — 4th lowest in MLB; League Avg: 23%.

Blue Jays pitchers have a strikeout rate of 45% with two-strikes since last season — 3rd best in MLB; League Avg: 42%.

Blue Jays pitchers have walked 207 of 2,986 batters (7%) when facing the leadoff batter in the inning since the 2022 season — 5th best in MLB; League Avg: 8%.

Blue Jays vs. Mariners Injuries Tonight That May Affect Prop Bets 

  • Erik Swanson (Toronto Blue Jays): Forearm, 15-Day IL
  • Jordan Romano (Toronto Blue Jays): Elbow, 15-Day IL
  • Bo Bichette (Toronto Blue Jays): Neck, Day-To-Day
  • Danny Jansen (Toronto Blue Jays): Wrist, 10-Day IL
  • Alek Manoah (Toronto Blue Jays): Shoulder, 15-Day IL
  • 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

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Our BetMGM editors and authors are sports experts with a wealth of knowledge of the sports industry at all levels. Their coverage includes sports news, previews and predictions, fun facts, and betting.