Blue Jays vs Mariners Prediction — AI Finds CAN'T MISS MLB Lines & Props (May 09)

Updated: 2025-05-07T03:31:50.923562ZBy Remi at Leans.AI — AI picks for ATS, ML, OU & props

The Toronto Blue Jays and Seattle Mariners will face off on May 9, 2025, at T-Mobile Park in Seattle. The Mariners, leading the AL West with a 20–13 record, are favored at -141, while the Blue Jays, sitting at 16–19, are underdogs at +119.

Get key insights, betting trends, and AI-powered predictions to help incorporate into your betting strategies.

AI Sports Betting Algorithm Remi

GAME INFO

Date: May 09, 2025

Start Time: 9:40 PM EST​

Venue: T-Mobile Park​

Mariners Record: (22-14)

Blue Jays Record: (17-20)

OPENING ODDS

TOR Moneyline: +119

SEA Moneyline: -141

TOR Spread: +1.5

SEA Spread: -1.5

Over/Under: 7.5

TOR
Betting Trends

  • The Blue Jays have struggled recently, going 4–9 against the spread (ATS) in their last 13 games.

SEA
Betting Trends

  • The Mariners have been strong at home, with a 7–1 record in their last eight games as moneyline favorites.

MATCHUP TRENDS

  • Seattle has hit the over in eight of their last ten games, indicating high-scoring affairs.

TOR vs. SEA
Best Prop Bet

  • Remi's searched hard and found the best prop for this matchup: C. Raleigh over 4.5 Fantasy Score.

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Toronto vs Seattle Prediction & Odds:
Free MLB Betting Insights for 5/9/25

The May 9, 2025 matchup between the Toronto Blue Jays and Seattle Mariners at T-Mobile Park features two teams trending in very different directions as they continue to navigate the first half of the MLB season. The Mariners enter the game as -141 favorites with a 20–13 record and sit atop the American League West, thriving behind a powerful offense and a well-rounded pitching staff that has kept them competitive in nearly every outing. Over their last 10 games, Seattle has averaged 6.8 runs per game and hit the over in eight of them, highlighting a lineup that is clicking across the board. Cal Raleigh leads the majors with 12 home runs and continues to provide thunder in the middle of the order, while Jorge Polanco and Julio Rodríguez offer dynamic production and versatility, combining speed, power, and contact in key situations. Seattle’s pitching has been equally reliable with a 3.50 ERA over the same stretch, allowing the team to control games early and build on leads. On the other side, the Toronto Blue Jays arrive in Seattle with a 16–19 record and plenty of questions surrounding both their lineup and rotation. They’ve gone 4–9 against the spread in their last 13 games, a reflection of their inability to perform up to expectations or deliver consistently on either side of the ball.

Toronto ranks 28th in the league in runs scored and has a team ERA of 4.36, illustrating their ongoing struggles with run prevention and offensive rhythm. However, ace Kevin Gausman offers a glimmer of hope—his 0.71 WHIP ranks among the best in baseball, and he’ll be tasked with containing a red-hot Mariners offense. The Blue Jays will also look for breakout performances from Vladimir Guerrero Jr. and Bo Bichette, both of whom have underwhelmed early but are capable of turning any game around with a few big swings. This matchup poses a significant challenge for Toronto, not just in terms of raw talent but also in navigating a hostile road environment against a Mariners squad that is 7–1 in their last eight games as a moneyline favorite. For the Blue Jays to have a chance, they’ll need to get a strong outing from Gausman, play clean defense, and find timely hits from their top and middle-order bats—no easy task against a balanced and confident Seattle team. On paper, the Mariners have the edge in power, consistency, and bullpen depth, and unless the Blue Jays can tighten things up quickly, this game could slip away early. It sets the stage for an important test for both teams: Seattle seeks to extend its dominance and continue building its division lead, while Toronto is in need of a signature win to begin righting the ship and reestablishing itself as a true postseason threat.

Toronto Blue Jays MLB Preview

The Toronto Blue Jays arrive at T-Mobile Park for their May 9, 2025 matchup against the Seattle Mariners in need of a course correction after a lackluster start to the season. Sitting at 16–19, the Blue Jays are in the bottom half of the American League and have struggled to establish any consistency, particularly on offense, where they rank 28th in runs scored. Their recent 4–9 ATS record over the past 13 games illustrates a team that has not only been losing more often than not but also failing to meet expectations from both a betting and performance standpoint. A major issue for Toronto has been its inability to produce with runners in scoring position and string together innings; what should be a dangerous lineup led by Vladimir Guerrero Jr. and Bo Bichette has underperformed significantly. Guerrero has lacked the consistent power output that defined his All-Star campaigns, while Bichette’s batting average and on-base percentage have dipped, leaving Toronto without a dependable offensive engine.

Despite these struggles, the Blue Jays will turn to Kevin Gausman on the mound, and he offers them their best shot at slowing down Seattle’s red-hot bats. Gausman leads the league with a 0.71 WHIP, demonstrating elite control and an ability to limit base runners, though his individual brilliance has often been undermined by a lack of run support. Toronto’s pitching staff overall owns a 4.36 ERA, which is middling, but Gausman gives them a clear ace to anchor the rotation. To have any chance at stealing a win in Seattle, the Blue Jays will need to play to their strengths: get six or seven strong innings from Gausman, support him with clean defense, and scrape together runs through aggressive baserunning and timely hits. With Seattle hitting the over in eight of their last ten games, it’s clear Toronto’s pitching—and particularly its bullpen—will face pressure to hold leads and not allow late-game surges. Defensively, Toronto has held up reasonably well, but they’ve been prone to miscues in high-leverage spots, and those mistakes have proven costly in multiple losses. Manager John Schneider will need to spark urgency in his club and possibly shake up the lineup to ignite the offense. A win against the AL West-leading Mariners could provide a much-needed jolt and potentially trigger a turnaround, but the margin for error is thin. For a team with postseason aspirations, this stretch on the road presents an opportunity to test their resilience, and if they’re going to make a move, it has to begin with disciplined, focused play in games like this one. The Blue Jays have the talent to hang with Seattle, but talent alone won’t cut it against one of the league’s most in-form clubs—they’ll need execution, grit, and a sense of urgency they’ve yet to fully show in 2025.

The Toronto Blue Jays and Seattle Mariners will face off on May 9, 2025, at T-Mobile Park in Seattle. The Mariners, leading the AL West with a 20–13 record, are favored at -141, while the Blue Jays, sitting at 16–19, are underdogs at +119. Toronto vs Seattle AI Prediction: Free MLB Betting Insights for May 09. Credit USA TODAY/IMAGN

Credit: USA TODAY/IMAGN

Seattle Mariners MLB Preview

The Seattle Mariners return to T-Mobile Park on May 9, 2025, riding a wave of momentum that has propelled them to a 20–13 record and first place in the American League West. Their dominance at home has been impressive, as they’ve gone 7–1 in their last eight games as moneyline favorites and are consistently outscoring opponents thanks to a red-hot offense and dependable pitching staff. At the heart of Seattle’s offensive surge is catcher Cal Raleigh, who leads the majors with 12 home runs and continues to provide clutch power in the middle of the lineup. He’s been backed by Jorge Polanco, whose team-leading 27 RBIs have made him a vital run producer, while Julio Rodríguez adds a multidimensional threat with his blend of speed and pop. Over their last 10 games, the Mariners have averaged 6.8 runs per game and hit the over in eight of those contests, suggesting a team firing on all cylinders offensively. The lineup’s depth and ability to string together big innings have overwhelmed opponents, and they’ve taken full advantage of their favorable home environment. On the pitching side, Seattle has matched their offensive output with a 3.50 ERA during that same 10-game stretch, showing strong balance that few teams in the league can currently match. The rotation has provided consistent quality starts, and the bullpen has done its job shutting the door when called upon, preventing late-inning drama.

The defense has also played a major role in Seattle’s success, with solid fundamentals, minimal errors, and excellent outfield coverage helping limit extra-base hits and preserve slim leads. Manager Scott Servais has done an excellent job keeping the team focused, rotating players effectively, and allowing the offense to stay aggressive while trusting his pitching staff to protect leads. As they prepare to host the Toronto Blue Jays, the Mariners will look to continue attacking early, forcing Toronto’s starter Kevin Gausman into high pitch counts, and pressuring the Blue Jays’ inconsistent bullpen. Given Toronto’s recent struggles—especially on the road and in producing runs—the Mariners will feel confident they can dictate the game’s tempo from the outset. Seattle’s recent track record also suggests they’re capable of maintaining this form, with both statistical consistency and emotional momentum pointing toward a team entering midseason form well ahead of schedule. A win would further solidify their grip on the AL West and reaffirm their status as one of the American League’s most complete and dangerous teams. With a high-performing core and home-field confidence, the Mariners are poised not just to win but to continue sending a message to the rest of the league: they are built to compete and built to last.

Toronto vs. Seattle Prop Picks (AI)

Remi is pouring through tons of stats on each player. In fact, anytime the Blue Jays and Mariners play there’s always several intriguing trends to key in on. Not to mention games played at T-Mobile Park in May can often follow normal, predictable patterns.
Remi's searched hard and found the best prop for this matchup: C. Raleigh over 4.5 Fantasy Score.

Toronto vs. Seattle Prediction (AI)

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Remi, our AI sports genius, has been pouring over millions of data from every facet between the Blue Jays and Mariners and using recursive machine learning and impressive AI to analyze the data to a single cover probability.

Remi has been most fixated on the unproportionally assigned factor human bettors often put on Toronto’s strength factors between a Blue Jays team going up against a possibly tired Mariners team. Trends look to say the true game analytics might reflect a moderate lean against one Vegas line specifically.

Unlock this in-depth AI prediction and all of our MLB AI picks for FREE now.

Below is our current AI Toronto vs Seattle picks, computer picks Blue Jays vs Mariners, best bets, model edges, confidence ratings.

DATE GAME LEAN %WIN UNITS LEVEL
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Blue Jays Betting Trends

The Blue Jays have struggled recently, going 4–9 against the spread (ATS) in their last 13 games.

Mariners Betting Trends

The Mariners have been strong at home, with a 7–1 record in their last eight games as moneyline favorites.

Blue Jays vs. Mariners Matchup Trends

Seattle has hit the over in eight of their last ten games, indicating high-scoring affairs.

Toronto vs. Seattle Game Info

Toronto vs Seattle starts on May 09, 2025 at 9:40 PM EST.

Spread: Seattle -1.5
Moneyline: Toronto +119, Seattle -141
Over/Under: 7.5

Toronto: (17-20)  |  Seattle: (22-14)

Remi's searched hard and found the best prop for this matchup: C. Raleigh over 4.5 Fantasy Score.. Prices move—always shop for the best number.

Seattle has hit the over in eight of their last ten games, indicating high-scoring affairs.

TOR trend: The Blue Jays have struggled recently, going 4–9 against the spread (ATS) in their last 13 games.

SEA trend: The Mariners have been strong at home, with a 7–1 record in their last eight games as moneyline favorites.

See our latest MLB picks and odds pages for 2025 to compare prices before you bet.

Toronto vs. Seattle Odds

AI algorithm Remi is pouring through mountains of data points on each team. In fact, anytime the Toronto vs Seattle trends are analyzed, there’s always several intriguing observations to key in on. Not to mention games played at extreme temps rarely follow normal, predictable betting trends.

Toronto vs Seattle Opening Odds

TOR Moneyline: +119
SEA Moneyline: -141
TOR Spread: +1.5
SEA Spread: -1.5
Over/Under: 7.5

Toronto vs Seattle Live Odds

Games PTS ML SPR O/U
Oct 19, 2025 8:04PM EDT
Seattle Mariners
Toronto Blue Jays
10/19/25 8:04PM
Mariners
Blue Jays
+108
-126
+1.5 (-205)
-1.5 (+168)
O 7.5 (-110)
U 7.5 (-110)

MLB Past Picks

Remi—our in-house AI—prices every game and prop using multi-season priors, tempo/efficiency, injury/usage signals, and market movement.
We publish fair prices, recommended “buy-to” numbers, and confidence so you can bet prices, not teams.

This preview covers Toronto Blue Jays vs. Seattle Mariners on May 09, 2025 at T-Mobile Park.
Odds shown reflect widely available numbers and may update closer to kickoff.

Want more? Check live edges, player props, and line moves on our MLB odds pages, and compare prices before you place a bet.

    LEAN     %WIN     UNITS RESULT
TOR@SEA OVER 7 54.9% 3 WIN
LAD@MIL UNDER 7.5 56.6% 6 WIN
TOR@NYY OVER 8 54.9% 4 WIN
TOR@NYY CARLOS RODON OVER 1.5 TOTAL WALKS ALLOWED 53.3% 3 WIN
NYY@TOR OVER 7.5 54.8% 2 WIN
LAD@PHI OVER 7 53.8% 3 WIN
SD@CHC CHC -109 53.8% 3 WIN
SD@CHC OVER 7.5 54.5% 4 LOSS
SD@CHC CHC -111 54.8% 4 LOSS
CIN@LAD SHOHEI OHTANI OVER 1.5 BASES 53.5% 3 WIN
BOS@NYY OVER 7 53.8% 3 LOSS
CIN@LAD ELLY DE LA CRUZ OVER 0.5 BASES 54.4% 4 LOSS
ARI@SD SD -131 57.3% 4 WIN
DET@BOS BOS -115 56.4% 5 WIN
NYM@CHC NYM -110 54.1% 3 WIN
HOU@ATH ATH +118 50.8% 4 WIN
NYM@CHC OVER 7 54.5% 3 WIN
STL@SF OVER 7.5 55.9% 5 LOSS
KC@LAA TYLER TOLBERT UNDER 1.5 BASES 54.4% 4 WIN
MIL@SD UNDER 9 54.7% 4 WIN
MIA@PHI KYLE SCHWARBER OVER 1.5 HITS+RUNS+RBIS 53.3% 3 WIN
WAS@NYM OVER 8.5 56.1% 6 LOSS
LAA@COL COL +108 50.5% 3 WIN
TOR@KC UNDER 9 54.7% 4 LOSS
SEA@KC KC +1.5 62.3% 5 LOSS
NYY@MIN OVER 9 55.1% 4 WIN
MIA@COL OVER 10.5 55.0% 4 WIN
MIA@COL AGUSTIN RAMIREZ OVER 1.5 HITS+RUNS+RBIS 54.3% 4 WIN
SEA@KC BOBBY WITT UNDER 0.5 SINGLES 54.4% 4 LOSS
PHI@LAD LAD -113 54.7% 4 LOSS
NYY@BOS OVER 7.5 54.3% 3 WIN
KC@PHI PHI -130 58.3% 4 WIN
LAD@SF OVER 7.5 54.7% 4 LOSS
NYM@PHI PHI -122 55.6% 4 WIN
KC@CLE KC -104 52.0% 3 WIN
CIN@SD JAKE CRONEWORTH OVER 0.5 HITS 53.1% 3 WIN
WAS@MIA MIA -123 55.2% 4 LOSS
LAA@KC UNDER 9.5 54.9% 3 WIN
TEX@ARI UNDER 9 54.2% 4 WIN
SF@COL UNDER 11.5 56.4% 6 LOSS
SF@COL RAFAEL DEVERS OVER 1.5 BASES 56.1% 6 WIN
MIA@WAS WAS -110 54.4% 4 WIN
NYM@DET OVER 8.5 54.5% 4 WIN
TEX@ARI UNDER 9.5 56.4% 6 WIN
TEX@ARI ALEJANDRO OSUNA UNDER 1.5 BASES 54.1% 4 LOSS
ATL@CHC CHC -116 55.1% 3 WIN
PHI@MIL OVER 8.5 55.0% 3 WIN
ARI@LAD SHOHEI OHTANI OVER 2.5 BASES 54.2% 4 WIN
SEA@CLE CLE +1.5 57.2% 3 WIN
CHC@SF CHC -105 54.1% 4 LOSS
NYY@CHW RYAN MCMAHON OVER 0.5 BASES 54.1% 4 WIN