Blue Jays vs Mariners Prediction, Odds & Player Prop Bets Today – MLB, May 9

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)
  • The Mariners are -130 favorites vs the Blue Jays
  • Blue Jays vs Mariners Over / Under today: 7.5 Runs
  • Blue Jays / Mariners TV Channel: RSN1 | RTNW

The Toronto Blue Jays (+110) visit T-Mobile Park to take on the Seattle Mariners (-130) on Friday, May 9, 2025. First pitch is scheduled for 9:40pm EDT in Seattle, WA, WA.

This season, the Blue Jays are 17-20 against the spread (ATS), while the Mariners are 19-17 ATS.

Blue Jays vs Mariners Starting Pitchers Today:

  • Blue Jays starting pitcher: Kevin Gausman 2-3, 3.86 ERA
  • Mariners starting pitcher: Luis Castillo 0-0, 7.05 ERA

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

SpreadOver / UnderMoneyline
Blue Jays+1.5 -210O 7.5 -120+110
Mariners -1.5 +170U 7.5 +100-130

Blue Jays vs Mariners Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Friday‘s MLB game with 55.0% 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 Blue Jays players for Friday‘s game, looking at profitable historical betting trends:

Best Blue Jays Player Prop Bets Today:

  • Alejandro Kirk has hit the Runs Under in 14 of his last 15 games (+12.20 Units / 38% ROI)
  • Nathan Lukes has hit the Home Runs Over in 1 of his last 4 away games (+8.00 Units / 200% ROI)
  • Bo Bichette has hit the Total Bases Under in 8 of his last 9 away games (+6.60 Units / 54% ROI)
  • Vladimir Guerrero Jr has hit the Hits Runs and RBIs Over in 17 of his last 25 games (+6.55 Units / 19% ROI)
  • Anthony Santander has hit the RBIs Over in his last 4 away games (+6.40 Units / 160% ROI)

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

Best Mariners Player Prop Best Bets Today:

  • J.P. Crawford has hit the Singles Over in 19 of his last 25 games (+18.05 Units / 68% ROI)
  • J.P. Crawford has hit the Hits Over in 21 of his last 25 games (+17.10 Units / 48% ROI)
  • Jorge Polanco has hit the Home Runs Over in 4 of his last 7 games at home (+16.00 Units / 229% ROI)
  • J.P. Crawford has hit the Total Bases Over in 19 of his last 25 games (+13.95 Units / 45% ROI)
  • J.P. Crawford has hit the Walks Over in 8 of his last 10 games at home (+9.90 Units / 99% ROI)
  • The Toronto Blue Jays have hit the 1st Five Innings (F5) Team Total Under in 14 of their last 18 away games (+10.45 Units / 51% ROI)
  • The Toronto Blue Jays have hit the Team Total Under in 13 of their last 18 away games (+7.50 Units / 36% ROI)
  • The Toronto Blue Jays have covered the Run Line in 22 of their last 36 games (+5.60 Units / 11% ROI)
  • The Toronto Blue Jays have hit the Game Total Under in 12 of their last 18 away games (+5.37 Units / 26% ROI)
  • The Toronto Blue Jays have covered the 1st Five Innings (F5) Run Line in 8 of their last 15 away games (+0.10 Units / 1% ROI)
  • The Seattle Mariners have hit the Game Total Over in 18 of their last 24 games (+11.25 Units / 43% ROI)
  • The Seattle Mariners have hit the Team Total Over in 21 of their last 30 games (+11.25 Units / 32% ROI)
  • The Seattle Mariners have hit the Moneyline in 18 of their last 24 games (+11.00 Units / 35% ROI)
  • The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Over in 20 of their last 30 games (+9.65 Units / 27% ROI)
  • The Seattle Mariners have covered the Run Line in 15 of their last 24 games (+7.35 Units / 25% ROI)

Blue Jays Against the Spread (ATS) Record

Against the spread this season, the Blue Jays are 22-15 against the Run Line (+4.6 Units / 8.75% ROI).

  • 17-20 when betting on the Moneyline for -3.2 Units / -7.55% ROI
  • 17-20 when betting on the total runs Over for -4.55 Units / -11.27% ROI
  • 20-17 when betting on the total runs Under for +1.42 Units / 3.46% ROI

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 19-17 against the Run Line (+2.65 Units / 5.87% ROI).

  • 22-14 when betting on the Moneyline for +4.65 Units / 9.64% ROI
  • 21-13 when betting on the total runs Over for +6.55 Units / 16.67% ROI
  • 13-21 when betting on the total runs Under for -10.5 Units / -26.28% ROI

Mariners vs Blue Jays Home Run Prop Bets Today

Over Under
Cal Raleigh (SEA) 0.5 +310 0.5 -400
Anthony Santander (TOR) 0.5 +350 0.5 -450
Daulton Varsho (TOR) 0.5 +350 0.5 -450
Jorge Polanco (SEA) 0.5 +375 0.5 -525
Julio Rodriguez (SEA) 0.5 +425 0.5 -625

Mariners vs Blue Jays Total Hits Prop Bets Today

Over Under
Julio Rodriguez (SEA) 0.5 -235 0.5 +175
Vladimir Guerrero Jr. (TOR) 0.5 -225 0.5 +170
Anthony Santander (TOR) 0.5 -210 0.5 +155
J.P. Crawford (SEA) 0.5 -175 0.5 +135
Alejandro Kirk (TOR) 0.5 -175 0.5 +130

Mariners vs Blue Jays RBI Prop Bets Today

Over Under
Cal Raleigh (SEA) 0.5 +130 0.5 -175
Anthony Santander (TOR) 0.5 +145 0.5 -190
Daulton Varsho (TOR) 0.5 +165 0.5 -220
Julio Rodriguez (SEA) 0.5 +180 0.5 -235
Vladimir Guerrero Jr. (TOR) 0.5 +195 0.5 -250

Mariners vs Blue Jays Strikeout Prop Bets Today

Over Under
Kevin Gausman (TOR) 5.5 -150 5.5 +115
Luis Castillo (SEA) 4.5 -125 4.5 -105

Opponents are hitting just .158 (9-for-57) against Kevin Gausman when going through the lineup the first time in a game this season — 2nd best among among AL Starters; League Avg: .237 — 97th Percentile.

Kevin Gausman has located his fastball up for a strike 76% (800/1,058) of the time since the 2023 season — highest in MLB among starting pitchers with at least 143 total IP; League Avg: 61% — 100th Percentile.

Kevin Gausman has located his fastball up for a strike 76% (460/609) of the time since last season — highest in MLB among starting pitchers with at least 78 total IP; League Avg: 60% — 100th Percentile.

Opponents are hitting just .158 (9-for-57) against Kevin Gausman when going through the lineup the first time in a game this season — 4th best among qualified SPs in MLB; League Avg: .232 — 96th Percentile.

Mariners Starting Pitcher Stats & Trends

Luis Castillo has thrown fastballs 68% of the time (1,245/1,829) against right-handed batters since last season — highest among among AL Starters; League Avg: 46% — 100th Percentile.

Luis Castillo allowed a slugging percentage of .415 (154 Total Bases / 371 ABs) when behind in the count in the 2024 season — 2nd highest among qualified SPs in MLB; League Avg: .292 — third Percentile.

Luis Castillo has struck out just 15% (13/84) of left-handed batters he faced this season — tied for 7th lowest among qualified SPs in MLB; League Avg: 23% — 13th Percentile.

Luis Castillo has thrown fastballs 68% of the time (441/652) this season — 2nd highest among among AL Starters; League Avg: 48% — 97th Percentile.

Blue Jays Keys to the Game vs. the Mariners

The Blue Jays are just 10-4 (.714) when leading entering the 8th inning this season — lowest in MLB; League Avg: .912.

The Blue Jays are 29-17 (.630) when tied entering the 7th inning since the 2023 season — 2nd best in MLB; League Avg: .499.

The Blue Jays were just 17-75 (.185) when they scored 4 or fewer runs in the 2024 season — 2nd lowest in MLB; League Avg: .276.

The Blue Jays were just 2-75 (.026) when trailing entering the 9th inning in the 2024 season — 5th lowest in MLB; League Avg: .050.

Mariners Keys to the Game vs. the Blue Jays

The Mariners are 3-11 (.214) when trailing entering the 9th inning this season — best in MLB; League Avg: .045.

The Mariners were 58-5 (.921) when they scored 5 or more runs in the 2024 season — best in MLB; League Avg: .804.

The Mariners are 14-0 (1.000) when leading entering the 7th inning this season — tied for best in MLB; League Avg: .875.

The Mariners are 24-2 (.923) when they’ve had 5 or more XBH since last season — 3rd best in MLB; League Avg: .809.

The Blue Jays are batting just .227 on the first pitch of at-bats this season — lowest in MLB; League Avg: .340.

Blue Jays hitters are slugging just .473 on the first pitch of at-bats since last season — lowest in MLB; League Avg: .562.

Blue Jays hitters slugged just .349 against LHP in the 2024 season — 2nd lowest in MLB; League Avg: .397.

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

The Mariners are batting just .207 when facing the starting pitcher for the 3rd time in a game since last season — lowest in MLB; League Avg: .262.

The Mariners are batting just .215 at home since last season — lowest in MLB; League Avg: .246.

The Mariners are batting just .225 when facing the starting pitcher for the 3rd time in a game since the 2023 season — lowest in MLB; League Avg: .264.

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.

Opponents have a groundball batting average of just .045 against Blue Jays pitchers with the shift this season — best in MLB; League Avg: .234.

Opponents had a miss rate of just 24% against Blue Jays pitchers in the 2024 season — tied for 2nd lowest in MLB; League Avg: 25%.

Blue Jays pitchers have a strikeout rate of 27% with runners in scoring position this season — best in MLB; League Avg: 21%.

Blue Jays pitchers had a strikeout rate of 24% with runners in scoring position in 2023 — 2nd best in MLB; League Avg: 22%.

Mariners pitchers walked 76 of 1,441 batters (5%) when facing the leadoff batter in the inning in the 2024 season — best in MLB; League Avg: 7%.

Mariners pitchers walked 369 of 5,801 batters (6%) in the 2024 season — best in MLB; League Avg: 8%.

Mariners pitchers have allowed an OBP of just .262 (1,768 PA’s) when facing the leadoff batter in the inning since last season — best in MLB; League Avg: .307.

Mariners pitchers have walked 6% of batters when facing the leadoff batter in the inning since the 2023 season — best in MLB; League Avg: 8%.

More MLB Reading:


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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.