Mariners vs. Astros Prediction, MLB Picks for Sunday Night Baseball – 8/16/26

For the second consecutive week, the Houston Astros (63-61) are featured on Sunday Night Baseball, but this time, the Astros are playing host with the Seattle Mariners (58-66) in town. According to PrizePicks Team Picks, the Astros are favored with a 1.75x payout if they win for tonight’s first pitch at 7:20 p.m. ET on NBC.

Tonight marks the third and final game of this AL West series, and it’s a rubber match following Houston’s 10-7 win in Game 1, paired with Seattle’s 10-5 victory on Saturday. The Mariners are 3-7 over the last 10 games, while the Astros carry a 5-5 record in the split.

Below, we’ll break down the Sunday Night Baseball matchup, including a Mariners vs. Astros prediction and player picks for projections via PrizePicks.

Make your Mariners vs. Astros picks for Sunday Night Baseball on PrizePicks now!

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Mariners vs. Astros Prediction, Winner, Over/Under – Sunday, August 16

Ahead of tonight’s game, the Astros sport a 2.0-game lead for first place in the AL West. Meanwhile, the Mariners’ recent struggles have harmed their chances of making the postseason—now sitting 5.0 games behind Houston for first place in the division and 3.0 games back from the final Wild Card spot in the American League.

While a Wild Card berth remains attainable for Seattle, this is an ultra-competitive race with seven teams within 3.0 games of the final spot in the American League. PrizePicks Team Picks gives the Mariners a 4.34x payout to qualify for the playoffs, compared to ‘No’ carrying a 1.14x payout.

With that said, Seattle is given a high probability to miss out on the postseason, and its 3-7 record over the last 10 games brings proof to the pudding. However, the Mariners are 2-1 over their last two games, totaling 6.0 runs per game in the split.

Anchored by SP Bryan Woo (8-8, 4.15 ERA, 3.59 xERA in 132.1 IP) making his 24th start tonight, Seattle looks to build on its momentum by securing a series win over the Astros.

Houston is on the opposite end of the spectrum, thanks to a 16-10 record since the All-Star break. This has propelled the Astros to first place in the AL West, and they now have the shortest payout to win the division (1.69x), paired with a 1.25x to qualify for the playoffs. 

SP Hunter Brown (3-2, 3.68 ERA, 3.65 xERA in 63.2 IP) makes his third start of August tonight. He’s struggled of late by allowing 3 earned runs in back-to-back starts, contributing to a 4.91 ERA during that span.

After the first two games of this series combined for 16.0 runs per game, will Sunday Night Baseball feature a high-scoring affair? 

Mariners vs. Astros Winner Payout, Over/Under – Sunday, August 16

Despite back-to-back overs to open the three-game series, tonight’s game carries a 7.5 over/under—the lowest of the series. The Astros are also favored in a sixth consecutive game, featuring a 1.75x payout if they win vs. the Mariners.

Here are the full payouts for the Mariners vs. Astros game on PrizePicks.

Make your Mariners vs. Astros prediction on the winner or over/under on PrizePicks Team Picks to earn real money—available in 36 states!

Team Picks data is live at the time of writing and is subject to change.

Mariners vs. Astros Prediction on Over/Under for Sunday Night Baseball – 8/16/26

Here are the key game stats and trends behind our Mariners vs. Astros prediction on the total for Sunday Night Baseball.

• As mentioned, the over is 2-0 in this series, fueled by 16.0 combined runs per game.
• Mariners SP Bryan Woo has not allowed a run in back-to-back starts, but he was vulnerable with a 6.43 ERA over four starts in July. 
• According to Baseball Savant, Woo gives up an 89.7 average exit velocity (27th percentile) and a 43.5% hard-hit rate (13th percentile).
• Houston has several dangerous sluggers in the lineup, headlined by DH Yordan Alvarez boasting an absurd 17.8% barrel rate (98th percentile) and 53.5% hard-hit rate (97th percentile).
• On the flip side, Astros SP Hunter Brown has yielded 3 earned runs in back-to-back showings and ceded 1 home run in three consecutive starts.
• Brown’s 4.27 SIERA suggests negative regression for his 3.68 ERA, and FanGraphs gives Houston’s hurler a 16.3% home run-to-fly ball rate (HR/FB) allowed that sits above the 11.7% league average.

Lock in your Mariners vs. Astros prediction on PrizePicks before the first pitch.

Mariners vs. Astros Picks, Player Stats for PrizePicks – 8/16/26

Here are the top Mariners vs. Astros picks to target on PrizePicks for Sunday, August 16. Tonight’s MLB picks for PrizePicks include Julio Rodriguez and Christian Walker.

Mariners OF Julio Rodriguez vs. Astros: 1.5 Hits + Runs + RBIs

• Julio Rodriguez is heating up at the right time, riding a four-game hit streak with a .319/.439/.532 slash line in August. 
• As mentioned, Hunter Brown has allowed home runs recently, and J-Rod carries a dangerous 76.7 average bat speed (95th percentile). Plus, he has 3 home runs this month, elevating his .426 SLG to .532 this month. 
• As divisional rivals, Rodriguez has seen plenty of Brown. Over 24 career at-bats in the matchup, Seattle’s center fielder carries a .333/.385/.542 slash line with 8 hits, 1 home run, and 5 RBIs, via Sports Reference.
• J-Rod has also racked up 4 runs scored over his previous four games. That boosts his combined hits, runs, and RBIs average to 2.5 per game over the past four contests. 

Add Julio Rodriguez to your PrizePicks Lineup now.

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Astros 1B Christian Walker vs. Mariners: 4.5 Hitter Fantasy Score 

• Reliable head-to-head numbers continue, as Christian Walker enjoys a .385 batting average and .769 SLG over 13 career at-bats against Mariners SP Bryan Woo.
• This head-to-head success could be thanks to Woo’s sinker. This pitch carries his second-highest usage rate (18.4%), and Walker boasts a career .317 batting average when facing sinkers. 
• Furthermore, Walker’s 74.4 average bat speed (74th percentile) may mean trouble for Woo—who allows a 43.5% hard-hit rate (13th percentile).
• Frankly, Houston’s first baseman has struggled with only 2 hits over his previous 19 at-bats (.105). But his success against Woo generates confidence, including 1 double and 1 RBI in a matchup on May 12. 

Add Christian Walker to your PrizePicks Lineup now.

Make Mariners vs. Astros Picks for Sunday Night Baseball on PrizePicks

The Mariners hope to catch the Astros atop the AL West, and securing a series win on Sunday Night Baseball would certainly help Seattle’s case. Will Houston continue to inch toward the postseason with another win on Sunday?

Don’t wait until the first pitch—make your Mariners vs. Astros picks on PrizePicks now and earn real money if you’re right.

Pick players, predict More or Less on their stats, and cash in if you’re right. With Team Picks, you can make predictions on game winners, spreads, and over/unders, now available in 36 states.

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