Mariners vs Blue Jays Prediction, Odds, Moneyline, Spread & Over/Under for May 9

Odds updated as of 10:11 a.m.

MLB action on Friday includes the Seattle Mariners taking on the Toronto Blue Jays.

We've got you covered, in terms of the most important information about this matchup before you take a look at the MLB odds and spreads on FanDuel Sportsbook.

Mariners vs Blue Jays Game Info

• Seattle Mariners (22-14) vs. Toronto Blue Jays (17-20)
• Date: Friday, May 9, 2025
• Time: 9:40 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: ROOT Sports NW and SN1

Mariners vs Blue Jays Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-136) | TOR: (+116)
• Spread: SEA: -1.5 (+152) | TOR: +1.5 (-184)
• Total: 7.5 -- Over: (-100) | Under: (-122)

Mariners vs Blue Jays Probable Starting Pitchers

Probable Pitchers: Luis Castillo (Mariners) - 3-2, 3.29 ERA vs Kevin Gausman (Blue Jays) - 2-3, 3.83 ERA

This contest's pitching matchup is set, as the Mariners will send Luis Castillo (3-2) to the mound, while Kevin Gausman (2-3) will answer the bell for the Blue Jays. Castillo's team is 3-4-0 against the spread this season in his starts. Castillo's team has won 50% of his starts when they are favored on the moneyline (3-3). The Blue Jays have a 3-4-0 ATS record in Gausman's seven starts with a set spread. The Blue Jays are 2-3 in Gausman's five starts this season that they were the moneyline underdog.

Mariners vs Blue Jays Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (59.2%)

Mariners vs Blue Jays Moneyline

• Looking at the moneyline for Mariners-Blue Jays, Seattle is the favorite at -136, and Toronto is +116 playing on the road.

Mariners vs Blue Jays Spread

• The Mariners are hosting the Blue Jays and are favored by 1.5 runs (+152 to cover) on the runline. Toronto is -184 to cover.

Mariners vs Blue Jays Over/Under

• An over/under of 7.5 has been set for Mariners-Blue Jays on May 9, with the over being -100 and the under -122.

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

Mariners vs Blue Jays Betting Trends

• The Mariners have been chosen as favorites in 23 games this year and have walked away with the win 15 times (65.2%) in those games.
• Seattle has a record of 10-3 when favored by -136 or more this year.
• The Mariners' games have gone over the total in 21 of their 36 opportunities.
• The Mariners have posted a record of 18-18-0 against the spread this season.
• The Blue Jays have won 43.5% of the games this season they were the underdog on the moneyline (10-13).
• Toronto has a 3-3 record (winning 50% of its games) when playing as a moneyline underdog of +116 or longer.
• The Blue Jays have played in 36 games with a set over/under, and have combined with opponents to go over the total 17 times (17-18-1).
• The Blue Jays have put together a 22-14-0 record against the spread this season (covering 61.1% of the time).

Mariners Player Leaders

• Cal Raleigh leads Seattle with 33 hits, batting .246 this season with 19 extra-base hits. He has an on-base percentage of .365 and a slugging percentage of .567.
• Among qualifying hitters in MLB, his batting average ranks 89th, his on-base percentage ranks 41st, and he is eighth in slugging.
• Raleigh will look for his third straight game with a hit in this contest. During his last five outings he is hitting .286 with a double, five walks and two RBIs.
• Jorge Polanco is batting .348 with six doubles, nine home runs and seven walks. He's slugging .707 with an on-base percentage of .396.
• Julio Rodriguez has 33 hits this season and has a slash line of .228/.325/.407.
• Rodriguez has recorded at least one base hit in two straight games. During his last five outings he is batting .300 with a home run, two walks and an RBI.
• J.P. Crawford leads the Mariners with an OPS of .798. He has a slash line of .288/.408/.390 this season.
• Crawford takes a 15-game hitting streak into this game. During his last 10 outings he is hitting .333 with a double, two home runs, seven walks and seven RBIs.

Blue Jays Player Leaders

• Vladimir Guerrero Jr. has seven doubles, four home runs and 20 walks while batting .295. He's slugging .432 with an on-base percentage of .383.
• He ranks 24th in batting average, 22nd in on-base percentage and 62nd in slugging percentage among all qualifying batters in the big leagues.
• Guerrero hopes to build on a 10-game hitting streak in this matchup. During his last 10 games he is batting .359 with a double, two home runs, five walks and six RBIs.
• George Springer paces his team with 31 hits and a .413 OBP. He has a batting average of .298 while slugging .510.
• He is currently 18th in batting average, fifth in on-base percentage and 24th in slugging percentage among all qualifying hitters.
• Bo Bichette has put up a slugging percentage of .363, a team-high for the Blue Jays.
• Andres Gimenez is batting .195 with five doubles, three home runs and 10 walks.

Mariners vs Blue Jays Head to Head

• 4/20/2025: 8-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -116, Underdog Moneyline: -102)
• 4/19/2025: 8-4 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -120, Underdog Moneyline: +102)
• 4/18/2025: 3-1 TOR (Favorite: Blue Jays, Spread: -1.5, Total: 8, Favorite Moneyline: -116, Underdog Moneyline: -102)
• 7/7/2024: 5-4 TOR (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -148, Underdog Moneyline: +126)
• 7/6/2024: 5-4 TOR (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 7/5/2024: 2-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -134, Underdog Moneyline: +116)
• 4/10/2024: 6-1 SEA (Favorite: Blue Jays, Spread: -1.5, Total: 8.5, Favorite Moneyline: -118, Underdog Moneyline: -100)
• 4/9/2024: 5-3 TOR (Favorite: Blue Jays, Spread: -1.5, Total: 8, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 4/8/2024: 5-2 TOR (Favorite: Blue Jays, Spread: -1.5, Total: 7.5, Favorite Moneyline: -118, Underdog Moneyline: -100)
• 7/23/2023: 4-3 TOR (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -138, Underdog Moneyline: +118)

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