The Seattle Mariners (59-52) host the Texas Rangers (57-54) on August 2, 2025. First pitch from T-Mobile Park is scheduled for 4:10 p.m. EDT; the game will be broadcast on RSN.
Find my MLB betting preview and Rangers vs Mariners prediction below, as well as probable pitchers, betting trends, injury reports and more.
Our Rangers vs Mariners Prediction
- Rangers vs Mariners pick: Under 7.5 (-125)
Our Rangers vs Mariners prediction is on the under. Make sure to find the best odds by checking our live MLB odds page.
Rangers vs Mariners Odds
| Rangers Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
-1.5 +170 | 7.5 105o / -125u | +100 |
| Mariners Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
+1.5 -210 | 7.5 105o / -125u | -120 |
Rangers vs Mariners Projected Starting Pitchers
| RHP Merrill Kelly (TEX) | Stat | RHP Luis Castillo (SEA) |
|---|---|---|
| 9-6 | W-L | 8-6 |
| 2.3 | fWAR (FanGraphs) | 2.3 |
| 3.22/3.89 | ERA / xERA | 3.19/4.19 |
| 3.54/3.61 | FIP / xFIP | 3.55/4.07 |
| 1.06 | WHIP | 1.21 |
| 16.1% | K-BB% | 14.2% |
| 45.0% | GB% | 41.3% |
| 91 | Stuff+ | 99 |
| 105 | Location+ | 104 |
Rangers vs Mariners Prediction, Betting Analysis
The Mariners look to stay hot against the Rangers on Saturday after taking the first two games of the series, including a dramatic 4-3 walk-off in Game 2.
J.P. Crawford’s ninth-inning homer sealed the comeback, helping Seattle close the gap on the AL West-leading Astros while pushing the Rangers two games back in the wild-card race.
Merrill Kelly will make his Texas debut after being traded from Arizona, and his most recent start against Seattle was a gem: six scoreless innings on June 9.
Meanwhile, Luis Castillo continues to dominate Texas, having logged four straight quality starts against the Rangers.
Despite recent offensive drama, this game sets up nicely for the Under, especially when viewed through the lens of Evan Abrams' “Contrarian Unders for Winning Teams, Later in Series” system.
This model targets series games (Game 2 or later) between two winning clubs, where public perception drives up expectations for scoring, but sharp bettors see value fading the Over. When public support for the under is at or below 35%, this system historically identifies inefficiencies in totals pricing, especially in tight, competitive matchups featuring strong pitching.
Pick: Under 7.5 (-125)
Rangers vs Mariners Betting Trends
