Prediction Details

MLB Prediction: Toronto Blue Jays vs Seattle Mariners — ALCS Game 3 (Wednesday, October 15 at 08:05 PM ET)

Introduction

Updated

TOR @ SEATOR +115SEA -141O/U 7.0
Market / Trend TOR SEA
Moneyline +115 -141
Total (O/U) 7.0
Run Line +1.5 (-195) -1.5 (165)
Last 5 RPG 5.6 5.4
Record 94–68 90–72
Lines: BetMGM, BetOnline.ag, BetRivers, BetUS +7 more

More MLB picks: Toronto Blue Jays · Seattle Mariners

With the League Championship Series shifting to Seattle, the Mariners hold a commanding 2–0 lead and the home crowd ready to push them toward a pennant berth. The Blue Jays face a must-win situation after dropping both games in Toronto, and every pitch carries elimination weight. This is the kind of October atmosphere where clutch hitting and composure define outcomes—Seattle’s balance and bullpen discipline have held firm through two tight wins, while Toronto now relies on its stars to spark a response on the road.

Game Time

Starts in 25h 15m

Game 3 is set for Wednesday, October 15 at 08:05 PM ET at T-Mobile Park — one of baseball’s most pitcher-friendly venues, now hosting its loudest crowd of the season.

Odds & Spread Line

  • Toronto Blue Jays: +115
  • Seattle Mariners: -141

Total: 7

  • Run Line — Toronto Blue Jays: +1.5 (-195)
  • Run Line — Seattle Mariners: -1.5 (+165)

Latest Team Records

Toronto Blue Jays: 94-68 (0.580 Win %)
Seattle Mariners: 90-72 (0.556 Win %)

Injury Report

Toronto continues without Bo Bichette (knee) and Jose Berrios (elbow), both significant October losses. Ty France remains out, further tightening the bench. Seattle enters Game 3 healthy and well-rested.

Key Player Stats

Toronto Blue Jays

  • George Springer: .309 AVG, 32 HR, 84 RBI
  • Vladimir Guerrero Jr.: .292 AVG, 23 HR, 84 RBI

Seattle Mariners

  • Cal Raleigh: .247 AVG, 60 HR, 125 RBI
  • Julio Rodriguez: .267 AVG, 32 HR, 95 RBI

Team Analysis

Toronto Blue Jays

Toronto’s margin for error is gone. Their core remains capable of producing early offense, but they must translate traffic into runs after leaving 17 men on base through the first two games. Springer and Guerrero Jr. have handled the moment before, yet the lineup’s strikeout rate has ballooned under playoff pressure. Expect a more aggressive approach early in counts to attack Seattle’s starters before leverage arms take over. Toronto still owns a strong 0.333 OBP profile and has hit .265 on the year, but October demands situational sharpness they’ve lacked so far.

Seattle Mariners

The Mariners return home thriving in rhythm and crowd energy. Their postseason at-bats have been relentless—drawing walks, extending counts, and capitalizing when ahead. Julio Rodriguez has fueled the attack, while Raleigh’s left-handed power continues to swing momentum. Seattle’s pitching depth and defensive efficiency have been the difference, keeping Toronto to just four runs combined in the first two games. At T-Mobile Park, their 53-31 regular-season record reinforces the comfort zone that can close out series fast.

Head-to-Head History

Seattle leads 6–4 in 2025 meetings

  • Oct 13 (ALCS G2): SEA 10 @ TOR 3
  • Oct 12 (ALCS G1): SEA 3 @ TOR 1
  • May 11: TOR 9 @ SEA 1
  • May 10: TOR 6 @ SEA 3
  • May 9: TOR 6 @ SEA 3
  • Apr 20: SEA 8 @ TOR 3
  • Apr 19: SEA 8 @ TOR 4
  • Apr 18: SEA 1 @ TOR 3

Over/Under Trends

Toronto Blue Jays games have averaged 10.6 runs across their last 10, with 5 overs against tonight’s total of 7.

Seattle Mariners contests have averaged 7.6 combined runs, clearing that same total 4 times.

Moneyline Betting Prediction

Momentum and setting tilt sharply toward Seattle. The Mariners’ ability to manufacture runs without leaving the yard—and the comfort of their home mound—make them the stronger play. Toronto’s lineup remains dangerous, but the situational hitting gap has widened across two games. With the crowd behind them and a rested staff, the Seattle Mariners at -141 are positioned to seize a 3–0 series lead.

Over/Under Prediction

Both clubs have leaned on quality pitching and two-strike command this series, and T-Mobile Park suppresses flight. Despite earlier regular-season scoring patterns, playoff tension and quick hooks on pitchers favor a lower tempo. The recommendation is the Under 7.0.

Bookmakers

MLB Lines retrieved from: FanDuel, Fanatics, Bovada, BetRivers.
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John Tamburino

John TamburinoVerified

Lead Analyst — data-first, former college baseball.

John Tamburino grew up on travel baseball and college ball before shifting to analytics. He still watches everything—from weekday tennis to MLB playoff nights—and will never forget the Diamondbacks’ World Series run. At Parlamaz, John blends trusted data feeds with context to find real value — no fluff, no paywalls.