Mariners vs Blue Jays Predictions: Toronto Prevails in Long ALCS

Our ALCS betting picks see Toronto racing out to an early lead over Seattle before clinching a World Series berth at home.

Eric Rosales - Contributor at Covers.com
Eric Rosales • Betting Analyst
Oct 11, 2025 • 20:00 ET • 4 min read
Toronto Blue Jays Ernie Clement MLB
Photo By - Imagn Images. Toronto Blue Jays third baseman Ernie Clement (22) hits a single.

The Seattle Mariners won an epic 15-inning elimination game over the Detroit Tigers to advance to the ALCS, starting Sunday at Rogers Centre in Toronto.

With less than 48 hours to start anew, and a pitching staff that’s definitely taxed against a Toronto Blue Jays team that popped champagne in the Bronx on Wednesday night, it has to be advantage: Toronto.

My Mariners vs. Blue Jays series predictions and MLB picks explain why the Jays will be returning to the World Series for the first time since 1993.

Best Mariners vs Blue Jays predictions

Mariners vs Blue Jays market snapshot

The Toronto Blue Jays are the -120 favorite to win the ALCS at BET99, and are currently +315 in the World Series odds. Only the Dodgers have shorter odds, sitting at +120.

The Seattle Mariners come in at +100 to topple Toronto and are right behind the Jays with +325 odds to win the Fall Classic.

Toronto’s series handicap of -1.5 pays out at +170 odds, while Seattle’s +1.5 line is a short -210.

If you want to pick the correct series score, the largest juice is for a Blue Jays sweep at +1300, while winning the series in five, six, or seven games comes in at +500. Seattle is +450 to win in seven, +550 in six, +600 in five, and +1200 to sweep.

Mariners vs Blue Jays series winner prediction

Pick: Blue Jays to win series (-120 at BET99)

Even if they didn’t own the rest advantage (which they do), I would still take Toronto to win this series so long as they have home field advantage (which they also do).

The Jays scored 431 runs at home in the regular season and pounded Yankees pitching in the first two games of the ALDS under the dome, scoring 23 runs.

What might have been surprising was the sudden pop in the Blue Jays bats. They were tied for 11th in home runs in the regular season, but have mashed nine bombs in the playoffs, trailing only the Cubs for the top spot.

Other than that, Toronto does what it always does: works counts and keeps turning the lineup over with their hitting, which is strong through the entire order.

Vladimir Guerrero Jr certainly deserves his flowers for tearing the laces off the ball during the series, going 9-for-17 with three homers and nine RBI, but there were so many others going well.

Daulton Varsho had seven hits in the series, five of those went for extra bases, while Ernie Clement matched Guerrero’s nine hits, but in three fewer at-bats. In total, only four Jays on the roster failed to connect on at least one extra-base hit.

As Seattle showed in Game 5 against Detroit, there is no quit in them, but they’re going to need a Luis Castillo gem or perhaps a Cal Raleigh wrecking-ball game to get out of Toronto with a crucial split.

If not, I just think Toronto is too strong to lose four of the final five games in the series.

Mariners vs Blue Jays total series games prediction

Pick: Blue Jays to win in six games (+500 at BET99)

Of the teams still standing in the postseason, Seattle’s pitching has been solid, ranked third in ERA at 3.29, and only the Dodgers have struck out more batters.

Toronto showed both sides of its bullpen against the Yankees, which is, amongst baseball circles, the teams’ biggest critique.

Game 3 in the Bronx had them blow a 6-1 lead to lose 9-6, before the entire staff came together and shut down the best offense in baseball to advance.

In all, the Blue Jays used eight relievers, limiting the Yankees to six hits and two earned runs in a 5-2 clinching win.

Statistically, Toronto has the worst bullpen of any team left standing (6.30 ERA), and the highest batting average against (.296).

There’s a reason John Schneider went with a three-man starting rotation in the ALDS, and why he’s reluctant to expand it in the ALCS – he’s just not confident enough in one arm going six. He’d rather patchwork it through to the end, manufacturing outs wherever he can get them.

In a closely contested series, I think Toronto’s bullpen could flop at times. Rookie Trey Yesavage won’t be throwing no-hitters and fanning 11 each start.

Pitching will be a concern at some point for Toronto, and that will cost them a game or two. Despite the Jays being better set up to advance, it may take a little longer than expected.

Pages related to this topic

Eric Rosales - Covers
Betting Analyst

Eric has been involved in sports media in many different capacities since graduating from journalism school in 1999, back when getting your own column in a newspaper was still considered a thing. He doubled down and graduated from broadcast journalism school five years later, which led to a move to Toronto and a career with The Sports Network (TSN). From behind-the-scenes production work, he moved into the digital realm, where he had his own hoops column (At the Buzzer), while regularly live streaming and chatting with fans during broadcasts as the character known as LeBlog James. He was also a key contributor to TSN and CTV’s Olympic programming during the 2012 London Games.

Eric eventually found his way into the sports betting field in 2016 and has been a mainstay ever since. He was tagged on Twitter as a Top 10 NBA sharp during the 2021 season and has been interviewed about basketball and his handicapping process on shows from Vancouver to India. Eric is now a jack-of-all-sports at Covers, where his predictions span the alphabet soup: NFL, NBA, MLB, NHL, F1, WNBA, Euro, and Copa.

When making picks, he focuses on finding value first and foremost, and ensuring readers have all the information they need to make an informed choice.

Popular Content

Covers is verified safe by: Evalon Logo GPWA Logo GDPR Logo GeoTrust Logo Evalon Logo