The 2025 American League Championship Series has a surprise entry that is making a significant impact on the baseball betting odds. Specifically, the Seattle Mariners were on nobody’s radar in the preseason future market. But Seattle proved tougher and more capable than anyone believed possible. In the final month of the season, the Mariners proved superior to the Houston Astros. The Mariners ended the Astros’ AL West dynasty in H-Town. Next, Seattle eliminated the Detroit Tigers in the ALDS. Now comes the ALCS against the AL East champion Toronto Blue Jays. Game 3 is scheduled for Wednesday in Seattle.
Following two games in Toronto, Seattle heads home with a 2-0 series lead.
Toronto Blue Jays vs. Seattle Mariners MLB Betting Information
| Date and Time: | Wednesday, October 15, 2025, 8 p.m. ET |
|---|---|
| Location: | T-Mobile Park, Seattle, WA |
| TV Coverage: | FS1 |
| Team | Spread | Total | ML | |
|---|---|---|---|---|
| Blue Jays | +1½ ( -195 ) | 7 ( -105 ) | +115 |  |
| Mariners | -1½ ( +165 ) | 7 ( -115 ) | -135 | |
| ||||
Right-hander Shane Bieber is the scheduled Toronto starter. In sum, Bieber was 4-2 with a 3.57 earned run average and 1.02 WHIP in 2025.
Right-hander George Kirby is the probable starter for Seattle. Overall, Kirby was 10-8 with a 4.21 ERA and 1.19 WHIP in 2025.
Blue Jays at Mariners Betting Odds Analysis
Overall, the Toronto Blue Jays were the third most profitable team on the sportsbook board at +1677 money line units and +1494 run line units. However, Toronto was -69 units on the road.
Also, the Seattle Mariners were a profitable value at +219 moneyline units. Of great concern is that Seattle was -1841 units on the run line. Seattle was a strong +464 units at T-Mobile Park.
The Blue Jays are the more respected brand among gamblers, given their more recent playoff appearances. Additionally, the Blue Jays have the credibility of winning the AL East and eliminating the New York Yankees 3-1 in the ALDS.
Wise Guys have taken a liking to the Mariners and their hidden wagering value. Cause by Seattle is not a public team. Thus, Seattle has consistently offered more value in the stretch drive of the regular season and in the playoffs. The casual sector is yet to be sold on the Mariners.
Toronto Blue Jays Team Overview
Toronto had a record of 97-69 and was 40-41 on the road. The Blue Jays were 89-72-5 over the total. Overall, the Blue Jays ranked 4th for run production, 3rd for OPS, and 11th for home runs. Toronto ranked 19th for earned run average and 16th for bullpen ERA.
Seattle Mariners Team Overview
The Seattle Mariners had a record of 93-74 and were 51-30 at home. Additionally, the Mariners went 91-70-6 over the total. Seattle ranked 10th for run production, 10th for OPS, 3rd for home runs, and 4th for stolen bases. Additionally, the Mariners ranked 13th in earned run average and 9th in bullpen ERA. Seattle was 7th in MLB for fewest errors committed.
Blue Jays at Mariners Betting Trends
Late in the season, the Blue Jays have failed to beat the MLB odds in seven of their most recent 11 away games. Eight of Toronto’s last 12 away games went over the total.
Seattle is printing money at T-Mobile Park. To show, the Mariners have seen the payout window in 15 of their last 20 home games. The Mariners went under the total in five of their most recent eight home games.
In the series between Toronto and Seattle, the Blue Jays got the cash in nine of their most recent 14 games with the Mariners. Additionally, seven of the last nine games between the Blue Jays and Mariners have gone over the total.
Specifically in Seattle, the Mariners paid out in six of their most recent seven games with the Blue Jays. Six of the last eight games between the Blue Jays and Mariners in Seattle went over the total.
Blue Jays at Mariners SBG Free Pick
Seattle is riding a wave of magic that has enhanced its confidence.
As mentioned earlier, the Mariners are strong at home, and this series is no exception.
Seattle has the superior bullpen and fielding.
Blue Jays at Mariners SBG Best Bet: Seattle Mariners.