MLB matchup analysis
Red Sox vs Rangers Prediction, Odds and Model Pick
Thursday, September 17, 2026 at Globe Life Field · 8:05 PM ET
Leo decision: Pass on Red Sox vs Rangers
The case for Boston Red Sox
The case for Texas Rangers
Why it is not official
Why the setup score is what it is
Why the price is what it is
Read the full model output
This is a bullpen game -- no confirmed traditional starter, so Leo does not publish an official pick here.
Final result
Red Sox 4, Rangers 3
How the analysis held up
Boston Red Sox won, the side Leo's model favored.
Sonny Gray (Boston Red Sox) was Leo's favored starter by pitcher score, but Tyler Alexander actually pitched better tonight: 1.0 IP, 0 ER (0.00 ERA) against 6.1 IP, 3 ER (4.26 ERA). The edge did not show up in this game.
The Boston Red Sox bullpen was not flagged pregame, but it had a night worth noting: 0 earned runs allowed over 2.2 relief innings (0.00 ERA) — quietly better than the pregame read implied.
The Texas Rangers bullpen was flagged as elevated risk pregame (Tired). In relief it actually allowed 4 earned runs over 8.0 innings (4.50 ERA) — the risk read showed up.
Game information
| Matchup | Boston Red Sox at Texas Rangers |
|---|---|
| Date | Thursday, September 17, 2026 |
| First pitch | 8:05 PM ET |
| Venue | Globe Life Field |
| Starting pitchers | Sonny Gray vs Tyler Alexander |
| Weather | Game-time forecast: 96°F, 0% precipitation chance, 10 mph wind from E. This venue has a roof, but the roof status is not confirmed. |
Starting pitcher matchup
Full Pitcher Matchup Tool →| Metric | Red Sox | Rangers |
|---|---|---|
| Pitching plan | Traditional starter | Opener / bullpen game |
| Expected innings | 5⅔ | 1⅓ |
| Throws | R | L |
| Leo pitcher score (higher is better) | 74 | 67 |
| ERA (lower is better) | 2.89 | 3.33 |
| WHIP (lower is better) | 1.18 | 1.27 |
| K/9 (higher is better) | 8.0 | 7.6 |
| K-BB% (higher is better) | 15.0% | 12.8% |
| K% (higher is better) | 21.8% | 19.8% |
| BB% (lower is better) | 6.8% | 6.9% |
| BB/9 (lower is better) | 2.5 | 2.7 |
| HR/9 (lower is better) | 0.9 | 0.4 |
| Ground-ball rate | 50.5% | 55.3% |
| Fly-ball rate | 49.5% | 44.7% |
Pitching plan edge: Leo gives Sonny Gray the edge over the Texas Rangers pitching plan (13 points on Leo's pitcher score). Tyler Alexander is projected for only 1⅓ innings, with the Texas Rangers bullpen covering the rest -- this compares Sonny Gray's own line against the Texas Rangers blended starting-pitcher-and-bullpen quality, not two starters directly.
Blended read: For the Texas Rangers, the bullpen is projected to throw more of the game than Tyler Alexander (about 1⅓ innings for the starter), so Leo grades that side on a whole-game effective ERA of 4.44 rather than Tyler Alexander's own 3.33. Whole-game, that is 3.26 for the Boston Red Sox against 4.44 on the other side, so the blended read leans Boston Red Sox.
How to read this: the scorecards above name the starters; every number lives in this table.
Strikeout Projections Full strikeout projections →
Same data source as the Pitcher Matchup Tool, where every starter on the slate is compared side by side.
Recent form
Full Stats page →Red Sox are 5-5 in their last 10 and averaging 3.4 runs per game over the last 15 days; Rangers are 6-4 in their last 10 and averaging 5.0 runs per game over the last 15 days. On the season Red Sox carry the better run differential per game (+0.54 against -0.25).
| Metric | Red Sox | Rangers |
|---|---|---|
| Last 10 | 5-5 | 6-4 |
| Last 10 by venue (away team on the road, home team at home) | 6-4 on the road | 6-4 at home |
| OPS, last 15 days | 0.661 | 0.744 |
| wOBA, last 15 days (hot/cold read) | 0.296 | 0.328 |
| Runs per game, last 15 days | 3.4 | 5.0 |
| K% last 15 days (lower is better) | 23.4% | 24.4% |
Last 15 days only. Hot and cold streaks for all 30 teams live on the Stats page.
30-day offense
Full offense tool →| Last 30 days | Red Sox | Rangers |
|---|---|---|
| OPS | 0.710 (-0.012 vs szn) | 0.749 (+0.032 vs szn) |
| Runs per game | 4.00 (-0.392 vs szn) | 4.68 (+0.509 vs szn) |
| wOBA (model offense input) | 0.316 | 0.330 (+0.012 vs szn) |
| K% (lower is better) | 20.7% (-0.7% vs szn) | 22.7% |
Over the last 30 days the Rangers have been the better offense, 0.330 wOBA to 0.316. They are running hot against their own season line (+0.012 wOBA).
Season profile
Full Stats page →| Metric | Red Sox | Rangers |
|---|---|---|
| Record | 82-70 | 76-76 |
| Run differential / game (team quality) | +0.54 | -0.25 |
| Runs scored / game (offense, season) | 4.39 | 4.17 |
| Runs allowed / game (defense, season, lower better) | 3.85 | 4.42 |
| Season OPS | 0.723 | 0.717 |
| K% season (lower is better) | 21.4% | 22.8% |
| OPS vs opposing hand (season) | 0.747 | 0.696 |
Season-long team quality, not recent form. Run differential and run environment come from the season standings; splits for all 30 teams live on the Stats page, including the run environment table.
The Map
Full interactive map →Every team on today's slate, on any two axes you pick. Red Sox and Rangers are highlighted.
Bullpen matchup
Full Bullpen Fatigue Index →Risk is what the model actually uses: fatigue blended with how well the pen has pitched. High fatigue with high efficiency is a tired pen that is still getting outs.
| Metric | Red Sox | Rangers |
|---|---|---|
| Fatigue | 5.9/10, Normal | 6.9/10, Tired |
| Efficiency | 6.1/10, Effective | 4.1/10, Below average |
| Combined risk | 5.4/10, Normal | 7.4/10, Tired |
| Relief innings, last 7 days | 16.7 | 23.0 |
| Back-to-back arms | 4 | 7 |
| 7-day ERA | 2.16 | 5.48 |
| 7-day WHIP | 1.38 | 1.39 |
Fatigue measures workload. Efficiency measures recent run prevention. Combined risk is what the moneyline and totals systems use.
Run total projection
Full Totals Projections →The model projects 1.9 runs above the market total. A research lean still requires a setup rating of at least 7.0/10. Team totals remain research-only until their graded sample is established.
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