Astros vs Mariners Expert Picks, Predictions & Splits April 13

• Seattle is trying to complete a 4-game sweep against Houston
• Seattle’s reliable starter George Kirby provides a massive pitching advantage for the Mariners
• Bettors are heavily aligned on this matchup, aggressively backing the Mariners to win and the Over on the 7.5-run total

The Seattle Mariners (7-9) try to complete a 4-game sweep vs. visiting Houston today. First pitch is set for 4:10 pm, ET, at T-Mobile Park.

The Astros (6-10) have lost seven in a row after starting the season 6-3.

Seattle’s George Kirby (1-2, 3.60) will go against Houston righty Mike Burrow (1-2, 5.60).

We analyze the final game of this 4-game set and provide expert betting advice for Astros at Mariners on Monday, April 13.

Astros vs Mariners Odds

The home team enters this clash as heavy moneyline favorites at -173, reflecting a commanding 60.73% vig-free implied win probability, while the road squad holds a 39.27% vig-free probability at +144. Houston remains favored to cover the +1.5 runline at -149. The game total is set at a modest 7.5 runs, with standard -110 juice applied to both sides.

Looking closely at line movement, sportsbooks adjusted their initial offerings due to heavy backing. Seattle originally opened as -162 moneyline favorites, but an influx of early action drove their price up to -173. The runline experienced a similar shift. The -1.5 spread opened at a lucrative +138, but after commanding substantial tickets, that payout shortened to +124. While the projected total held firm at 7.5 runs, the underlying juice shifted significantly. The Over originally opened at even money (+100) with the Under heavily juiced at -122. However, bettors relentlessly hammered the Over, forcing books to balance the juice at -110.

SEA RHP George Kirby vs HOU RHP Mike Burrows

George Kirby Stats vs Astros

Astros Hitters vs George Kirby

Mike Burrows vs Mariners

Mariners Hitters vs Mike Burrows

Astros vs Mariners Astros Predictions & Best Bets

Pick #1: Mariners (-173 at BetMGM)

When evaluating this American League clash, the glaring disparity on the mound makes Seattle the clear side to back. The Astros have been bleeding runs all season, staggering into this matchup with a disastrous 6.49 team ERA and a bloated 1.70 WHIP. Houston is currently in an overall slump, winning just 20.0% of their last 10 games (2-8 record) and going completely winless (0-5) as favorites in that same span. Meanwhile, Astros matchups have featured heavy run production recently, with the Over cashing at a 70.0% clip across their last 10 games.

The starting pitching matchup heavily favors the home team. Seattle’s George Kirby has been a model of efficiency, boasting a 3.60 ERA, a sparkling 0.90 WHIP, and an elite ability to limit traffic and induce the occasional inning-ending double play. Conversely, Houston’s Mike Burrows has struggled to find his footing, surrendering a staggering 12.37 hits per nine innings. While Seattle’s offense has been cold—hitting just .198 collectively—facing Burrows is the exact recipe needed to spark their bats.

Ultimately, the pitching advantage is simply too massive to ignore. Kirby should have no issue navigating the opposing lineup effectively enough to hand a lead over to a dominant bullpen that boasts a 2.10 ERA.

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Pick #2:Moneyline: OVER 7.5 Runs (-110 at DraftKings)

Despite Seattle’s offensive woes, Houston’s pitching staff is conceding runs at an alarming rate (6.31 per game). Furthermore, the road lineup remains dangerous, hitting .280 as a visiting unit. The combination of elite hitters and struggling arms scripts a higher-scoring affair.

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3 Best Player Props:

Yordan Alvarez OVER 1.5 Total Bases (+123 at Caesars): Even in a tough matchup against Kirby, Alvarez is scalding the baseball. He owns a monstrous 1.255 OPS, .340 batting average, and six home runs. Getting plus-money on his total bases is an immense value.

Julio Rodríguez OVER 1.5 Total Bases (+115 at BetMGM): Rodríguez is facing a very hittable Burrows. With the opposing pitcher surrendering heavy contact, this creates a prime bounce-back opportunity for the star outfielder to rack up an extra-base hit or multiple singles.

George Kirby To Record a Win (+114 at FanDuel): Kirby’s elite strike-throwing efficiency sets him up beautifully to pitch deep into this game and earn the decision against a struggling opponent.

Public Betting Splits & Market Action

Evaluating the MLB public betting market helps bettors find value.

Moneyline Market

Currently, 80.3% of the betting tickets are backing Seattle to secure the outright victory. More important, 62.3% of the total money is riding on them as well. The momentum is squarely in their corner, with ticket percentages increasing by 7.4% over time, making Houston a very unpopular underdog today.

Runline Market

Bettors are aggressively betting on a multi-run victory. The runline market shows 79.2% of the tickets and 77.0% of the money backing Seattle to cover the spread.

Total Runs Market

The most heavily skewed market on the board is the total: 91.9% of all tickets are riding on the Over, and the financial commitment is just as decisive, with 90.5% of the total money banking on a high-scoring script.