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ALCS Game 5: Blue Jays vs Mariners — Best Bets & Player Props (October 17, 2025)

ALCS Game 5: Blue Jays vs Mariners — Best Bets & Player Props (October 17, 2025)
Game Overview SEA -120 Total 7.5
The Blue Jays have erupted offensively after being outscored 13–4 in the first two games, posting 21 runs in Games 3 and 4 combined. Despite missing key bats like Bo Bichette and Ty France, Toronto’s lineup depth has shown resilience with clutch hitting from George Springer and Vladimir Guerrero Jr. The Mariners, meanwhile, have seen their power bats cool off, with Cal Raleigh and Julio Rodríguez combining for just two hits over the last two games.
Game 5 sets up as a battle of right-handers — Toronto’s Kevin Gausman versus Seattle’s Bryce Miller. Both pitchers have been steady this postseason, but with T-Mobile Park’s pitcher-friendly dimensions and two lineups trending in opposite directions, this matchup presents intriguing betting angles.
Pitching Matchup
Kevin Gausman (TOR): The veteran righty continues to deliver when it matters most. In 11.1 postseason innings, he’s posted a 2.38 ERA and 0.88 WHIP while limiting opponents to just seven hits. His splitter remains one of the most effective strikeout weapons in baseball, generating a 45% whiff rate. Gausman’s challenge will be controlling traffic early against a patient Seattle lineup that thrives on deep counts.
Bryce Miller (SEA): The rookie has matched every test this postseason, allowing only two runs across 10.1 innings. His 0.87 WHIP underscores how effectively he’s commanded the strike zone, but Toronto’s recent hot streak and Miller’s reliance on fastballs (63% usage) could spell trouble against aggressive hitters like Springer and Guerrero Jr., who crush high-velocity pitches.
Recent Trends
- Blue Jays: Toronto is 4–1 in its last five games, averaging 7.4 runs per contest during that stretch. Their bullpen ERA (2.12) has been stellar since Game 3.
- Mariners: Seattle has dropped three straight at home dating back to the Division Series. Their team batting average has plummeted to .197 over the last four games.
- Over/Under: The Over has hit in five of Toronto’s last six games as their offense has exploded after early struggles.
Key Factors
- Toronto’s lineup adjustments: Manager John Schneider’s decision to move Springer into the leadoff spot again has reignited the top of the order, leading to a .385 OBP over the last three games.
- Seattle’s bullpen fatigue: After allowing 21 runs across two games, the Mariners’ relievers are clearly worn down. They’ll need Miller to go at least six strong innings to reset their pen.
- T-Mobile Park effect: Seattle’s home field tends to suppress home runs, but Toronto’s line-drive approach could still yield extra-base hits down the gaps.
Player Props to Target
- George Springer — Over 0.5 Home Runs (+400): Springer has been dialed in with three homers in his last four games, including two off fastballs up in the zone — Miller’s biggest weakness.
- Vladimir Guerrero Jr. — Over 1.5 Total Bases (-110): Guerrero’s power stroke is back. He’s hitting .368 in this series and leads all players with seven RBIs.
- Julio Rodríguez — Over 0.5 RBIs (+130): Rodríguez remains Seattle’s best shot to spark the offense. Expect him to be more aggressive early in counts against Gausman’s splitter.
- Kevin Gausman — Over 6.5 Strikeouts (+115): Seattle’s high strikeout rate (27.8%) makes this an attractive play. Gausman has surpassed seven Ks in three of his last four postseason starts.
Advanced Angles
The analytics lean slightly toward Toronto. Over the past two games, the Blue Jays’ expected slugging percentage (xSLG) of .512 dwarfs Seattle’s .318, showing how hard their contact has been. Their bullpen has also posted a 1.09 WHIP compared to Seattle’s 1.66 in that span. Meanwhile, the Mariners’ strikeout rate has ballooned to 29% — unsustainable against a strike-thrower like Gausman.
However, it’s worth noting that the Mariners are 7–2 in Miller’s last nine home starts, and their crowd tends to give him early momentum. Still, unless he can neutralize Toronto’s fastball-hitting core, the edge tilts toward the Blue Jays once again.
Prediction
This series has turned into a game of momentum swings, and right now, all of it belongs to Toronto. With Gausman on the mound and the bats firing on all cylinders, the Blue Jays have the upper hand in Game 5. Expect a tight, low-scoring start that opens up late as Toronto’s lineup breaks through Miller’s fastball-heavy approach.
Bonus Prop Parlay: Gausman Over 6.5 K’s + Guerrero Jr. Over 1.5 TB (+375). A correlated parlay that aligns with Toronto controlling the tempo and punishing mistakes in the middle innings.
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