Check Out Comprehensive Player Prop Odds for Rangers vs Mariners – Thursday, July 31, 2025

Texas Rangers

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Seattle Mariners

As the Seattle Mariners prepare to host the Texas Rangers on July 31, 2025, both teams find themselves in a tight race with matching records of 57-52, showcasing above-average seasons. This matchup holds significance as it marks the first game of the series, and both teams are eager to gain an edge.

In their last outing, the Mariners showcased their offensive prowess by defeating the Rangers 8-5, a performance that highlighted their 10th-best offensive ranking in MLB. The Mariners are also among the league leaders in home runs, ranking 5th with 151, which is a vital aspect of their game. Their best hitter has been on fire recently, recording 8 hits and 4 home runs over the past week, further enhancing their chances against a struggling Rangers offense that ranks 27th in MLB.

On the mound, the Mariners are set to start George Kirby, who is currently ranked as the 31st best starting pitcher in MLB. Kirby’s average ERA of 4.50 reflects some misfortune this season, as his 3.31 xFIP suggests he could perform better moving forward. He projects to pitch 6.0 innings while allowing only 2.3 earned runs, which bodes well for the Mariners.

Conversely, the Rangers will counter with Kumar Rocker, whose ERA of 5.73 ranks him among the lower-tier pitchers this season. Rocker has struggled with strikeouts, sitting at a 20.0 K%, which could be problematic against a high-strikeout Mariners lineup. His tendency to generate ground balls might mitigate some damage, but with a 29th-ranked bullpen behind him, he faces an uphill battle.

With a Game Total set at a low 7.5 runs, the Mariners are favored with a moneyline of -155, indicating a solid expectation for their victory. Given their current form and offensive capabilities, the Mariners look to capitalize on this opportunity and take a step closer to solidifying their playoff aspirations.

Texas Rangers Insights

• Kumar Rocker – Over/Under 4.5 Strikeouts (-130/+100)
  The Seattle Mariners have 6 bats in the projected offense that will have the handedness advantage against Kumar Rocker today.
  Explain: Right-handed pitchers perform worse against left-handed hitters (and visa-versa). If several hitters hold this advantage against the pitcher, it can have a huge impact on whether he will perform well or struggle on any given day.
• Marcus Semien – Over/Under 1.5 Total Bases (+140/-185)
  Seattle’s 3rd-worst outfield defense of all teams on the slate creates a favorable matchup for Marcus Semien, who tends to hit a lot of flyballs.
  Explain: This player’s skill set matches up well with the opposing team’s defensive weakness, which may lead to better-than-usual performance.
• Kyle Higashioka – Over/Under 0.5 Total Bases (-130/+100)
  Kyle Higashioka pulls many of his flyballs (39.7% — 98th percentile) and is a great match for the park considering he’ll be hitting them towards the game’s 8th-shallowest LF fences in today’s game.
  Explain: This player’s skill set matches up particularly well with the park he’s in today, which may lead to better-than-usual performance.

Seattle Mariners Insights

• George Kirby – Over/Under 5.5 Strikeouts (-145/+115)
  George Kirby’s 95.3-mph fastball velocity this year is in the 86th percentile among all SPs.
  Explain: Velocity is a key component to fastball success in generating strikeouts and preventing runs.
• Jorge Polanco – Over/Under 0.5 Hits (-170/+135)
  Jorge Polanco has primarily hit in the top-half of the lineup this season (85% of the time), but he is projected to hit 6th in the lineup in this matchup.
  Explain: The lower in the order a player bats, the fewer plate appearances he will get and the fewer opportunities he will get to hit the Over for every market. A player who hits lower in the order than he normally does may provide extra value opportunity since the market may be based on him hitting higher.
• George Kirby – Over/Under 5.5 Strikeouts (-145/+115)
  Cal Raleigh, the Mariners’s expected catcher today, grades out as an elite pitch framer according to the leading projection system (THE BAT).
  Explain: Pitch framing is a catcher’s ability to make a ball look like a strike to the umpire, “stealing” strikes for his pitcher. This leads to more positive outcomes (like strikeouts) and fewer negative ones (like walks or earned runs).

Betting Trends

• Over/Under 7.5 Game Total (-110/-110)
  The Seattle Mariners have hit the Game Total Over in 56 of their last 102 games (+9.75 Units / 9% ROI)
• Texas Rangers – Over/Under 3.5 Team Total (+110/-140)
  The Texas Rangers have hit the Team Total Over in 16 of their last 22 games (+9.45 Units / 35% ROI)
• Wyatt Langford – Over/Under 0.5 Singles (+105/-135)
  Wyatt Langford has hit the Singles Over in 6 of his last 8 away games (+4.45 Units / 52% ROI)