ALCS Game 3 Seattle vs Toronto: Top 4 prop bets

Seattle leads the series 2–0 heading into Game 3 on home soil. Toronto is desperate to avoid going down 3–0, and the pressure ramps up for both starters: George Kirby for Seattle and Shane Bieber for Toronto. The Mariners opened as slight favorites (around –135) in many markets.

Pitching matchups in the postseason tend to suppress offense, but both lineups have shown they can strike — Seattle especially. Let’s dig into four prop plays that look interesting tonight.

1. Jorge Polanco Over 1.5 Hits + Runs + RBI (the “3-category total”)

Polanco has been one of Seattle’s most consistent bats in the postseason. In Games 1 and 2, he’s already recorded go-ahead damage, including a three-run homer in Game 2.

Against Bieber, who can be vulnerable when hitters get good counts and force mistakes, Polanco’s balanced approach gives him multiple ways to contribute — a hit, scoring, or driving in a run. The 1.5 line is modest for a 3-category aggregate. This feels like a strong baseline play.

Caesars

4.4/5

Tip: Polanco over 1.5 hits

• Polanco is consistent
• Game 2 HR
• Bieber will struggle

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2. George Kirby Over 4.5 Strikeouts

Kirby has the stuff to pile up punchouts, especially when the opposition is in a pressure spot and swinging aggressively. Seattle likely leans on its ground-ball / strikeout mix to keep Toronto off balance. The Over 4.5 strikeouts number is fairly common in postseason props, and with Toronto’s dangerous hitters (Vlad Jr., Clement, Varsho) trying to make an impact, he should have multiple opportunities. This is one of the safer pitching props in my view.

DraftKings

4.5/5

Tip: Kirby over 4.5 Strikeouts

• Pressure spot
• Desperate Blue Jays
• Good matchup for Kirby

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3. Alejandro Kirk to Hit a Home Run

Kirk is a volatile home-run candidate — feast or famine — but this is exactly the kind of moment where fans expect a splash. Toronto needs a big swing, and Kirk’s power (especially in a do-or-die mood) is capable of that. The juice on this prop is steep, so it’s a long shot, but the upside is lucrative if it connects. Covers lists it as one of its top prop bets for Game 3.

If you want something with a little more chance of hitting, you could consider “Kirk Over 0.5 Total Bases” or a “Home Run or RBI” variant (if offered) as lower-risk alternatives.

BetMGM

4.5/5

Tip: Kirk to Hit a HR

• Kirk is Dangerous
• Mariners Pitching edge
• Big upside

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4. Total Runs (Over / Under) Tilt: Under 7.0

Given that this is a crucial Game 3 and likely a pitcher’s duel, I lean toward a total run under. Playoff games with strong starters often see fewer big innings and more small-ball, tight execution. Both teams will be cautious, and bullpen usage could also suppress offense. While the Over has value in certain matchups, I think the safer side tonight is the Under — especially if Kirby and Bieber are sharp out of the gate.

FanDuel

4.6/5

Tip: Over/Under 7

• Pitcher’s Duel
• No big innings
• Tight game

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✅ Summary & Context

• Polanco Over 1.5 (multi-stat) and Kirby Over 4.5 Ks are my core plays — one bat-driven, one pitching-driven.

• Kirk HR is more speculative, but with big upside if Toronto needs a momentum shift.

• The Under on total runs is my game-structure hedge: expecting a tighter, lower-scoring affair given the stakes.

If you want to lean heavier on the offense, you could consider adding a Vlad Jr. extra-base hit or run prop, but for me, the above four offer a balance of realism and upside.