Blue Jays vs Mariners Prediction, Odds, Moneyline, Spread & Over/Under for July 3

Odds updated as of 9:12 p.m.

The Friday schedule in MLB includes a matchup between the Seattle Mariners and the Toronto Blue Jays.

Before you do any MLB betting on this game at FanDuel Sportsbook, here's everything you need to know.

Mariners vs Blue Jays Game Info

• Seattle Mariners (45-43) vs. Toronto Blue Jays (41-46)
• Date: Friday, July 3, 2026
• Time: 10:10 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: Mariners.TV and SNET

Mariners vs Blue Jays Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-162) | TOR: (+136)
• Spread: SEA: -1.5 (+140) | TOR: +1.5 (-170)
• Total: 7.5 -- Over: (-122) | Under: (+100)

Mariners vs Blue Jays Probable Starting Pitchers

Probable Pitchers: Luis Castillo (Mariners) - 3-6, 4.93 ERA vs Dylan Cease (Blue Jays) - 4-4, 3.02 ERA

This contest's pitching matchup is set, as the Mariners will send Luis Castillo (3-6) to the mound, while Dylan Cease (4-4) will get the nod for the Blue Jays. Castillo's team is 4-9-0 against the spread this season in his starts. Castillo's team has a record of 3-6 this season when he starts and they are the favorite on the moneyline. The Blue Jays are 9-6-0 ATS in Cease's 15 starts that had a set spread. The Blue Jays were the moneyline underdog for two Cease starts this season -- they split the games.

Mariners vs Blue Jays Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (50.1%)

Mariners vs Blue Jays Moneyline

• Looking at the moneyline for Mariners-Blue Jays, Seattle is the favorite at -162, and Toronto is +136 playing on the road.

Mariners vs Blue Jays Spread

• The Blue Jays are +1.5 on the spread (-170 to cover), and Seattle is +140 to cover the runline.

Mariners vs Blue Jays Over/Under

• A combined run total of 7.5 has been set for Mariners-Blue Jays on July 3, with the over at -122 and the under at +100.

Bet on Seattle Mariners vs. Toronto Blue Jays on FanDuel today!

Mariners vs Blue Jays Betting Trends

• The Mariners have won in 41, or 53.2%, of the 77 contests they have been named as odds-on favorites in this year.
• This season Seattle has come away with a win 10 times in 15 chances when named as a favorite of at least -162 on the moneyline.
• The Mariners and their opponents have gone over in 41 of their 87 games with a total set by sportsbooks this season.
• The Mariners are 32-55-0 against the spread in their 87 games with a line set by sportsbooks this season.
• The Blue Jays have gone 13-24 in games they were the underdog on the moneyline (winning 35.1% of those games).
• Toronto has a record of 1-2 when playing as a moneyline underdog with odds of +136 or longer (33.3%).
• The Blue Jays have had an over/under set by bookmakers 86 times, and have combined with opponents to go over the total in 45 of those games (45-40-1).
• The Blue Jays have collected a 41-45-0 record against the spread this season (covering 47.7% of the time).

Mariners Player Leaders

• Randy Arozarena leads Seattle in OBP (.375) and total hits (83) this season. He's batting .284 batting average while slugging .442.
• Among qualified hitters in the majors, he is 25th in batting average, 20th in on-base percentage, and 65th in slugging.
• Arozarena has hit safely in two straight games. In his last five games he is batting .278 with a double, a home run, a walk and four RBIs.
• Josh Naylor has 11 doubles, eight home runs and 27 walks. He's batting .254 and slugging .364 with an on-base percentage of .317.
• He is 80th in batting average, 105th in on-base percentage and 127th in slugging among qualified hitters.
• Cole Young has collected 82 base hits, an OBP of .320 and a slugging percentage of .388 this season.
• Dominic Canzone has been key for Seattle with 53 hits, an OBP of .345 plus a slugging percentage of .543.

Blue Jays Player Leaders

• Vladimir Guerrero Jr. a has .348 on-base percentage to pace the Blue Jays. He's batting .267 while slugging .350.
• Including all the qualifying hitters in the big leagues, his batting average ranks 57th, his on-base percentage ranks 50th, and he is 134th in slugging.
• Ernie Clement is slugging .439 to lead his team. He has a batting average of .299 with an on-base percentage of .322.
• He is 10th in batting average, 95th in on-base percentage and 67th in slugging percentage in the majors.
• Kazuma Okamoto has 73 hits, a team-high for the Blue Jays.
• Daulton Varsho is hitting .258 with 16 doubles, two triples, seven home runs and 24 walks.

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