MLB matchup analysis
Mariners vs Angels Prediction, Odds and Model Pick
Monday, September 14, 2026 at Angel Stadium · 9:38 PM ET
Leo decision: Pass on Mariners vs Angels
The case for Los Angeles Angels
The case for Seattle Mariners
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
The combined Lab Rating did not clear the official threshold.
Final result
Mariners 4, Angels 6
How the analysis held up
Los Angeles Angels won, the side Leo's model favored.
Leo's two internal reads disagreed pregame by 53.9 points — the team-strength model favored Los Angeles Angels, the run-projection model favored Seattle Mariners. The team-strength model had the winner here.
Reid Detmers (Los Angeles Angels), the starter Leo's pitcher score favored, actually outpitched Kade Anderson: 6.0 IP, 3 ER (4.50 ERA) against 4.1 IP, 5 ER (10.38 ERA). The edge held up.
Los Angeles Angels scored 6, 3.1 more than the 2.9 pregame projection.
Game information
| Matchup | Seattle Mariners at Los Angeles Angels |
|---|---|
| Date | Monday, September 14, 2026 |
| First pitch | 9:38 PM ET |
| Venue | Angel Stadium |
| Starting pitchers | Kade Anderson vs Reid Detmers |
| Weather | Game-time forecast: 74°F, 0% precipitation chance, 8 mph wind from SW. |
Starting pitcher matchup
Full Pitcher Matchup Tool →| Metric | Mariners | Angels |
|---|---|---|
| Pitching plan | Traditional starter | Traditional starter |
| Expected innings | 5⅓ | 5⅔ |
| Throws | L | L |
| Leo pitcher score (higher is better) | 54 | 76 |
| ERA (lower is better) | 4.29 | 3.32 |
| WHIP (lower is better) | 1.38 | 1.04 |
| K/9 (higher is better) | 6.9 | 10.2 |
| K-BB% (higher is better) | 9.2% | 21.7% |
| K% (higher is better) | 18.4% | 28.4% |
| BB% (lower is better) | 9.2% | 6.7% |
| BB/9 (lower is better) | 3.4 | 2.4 |
| HR/9 (lower is better) | 1.7 | 0.9 |
| Ground-ball rate | 40.5% | 40.2% |
| Fly-ball rate | 59.5% | 59.8% |
Pitcher edge: Leo gives Reid Detmers a 22-point edge over Kade Anderson, driven mainly by K-BB% (21.7% vs 9.2%) and K/9 (10.2 vs 6.9).
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 →Mariners are 4-6 in their last 10 and averaging 5.9 runs per game over the last 15 days; Angels are 3-7 in their last 10 and averaging 3.9 runs per game over the last 15 days. Season run differential separates them by almost nothing (-0.40 against -0.49).
| Metric | Mariners | Angels |
|---|---|---|
| Last 10 | 4-6 | 3-7 |
| Last 10 by venue (away team on the road, home team at home) | 3-7 on the road | 2-8 at home |
| OPS, last 15 days | 0.786 | 0.678 |
| wOBA, last 15 days (hot/cold read) | 0.345 | 0.302 |
| Runs per game, last 15 days | 5.9 | 3.9 |
| K% last 15 days (lower is better) | 22.5% | 27.3% |
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 | Mariners | Angels |
|---|---|---|
| OPS | 0.734 (+0.042 vs szn) | 0.640 (-0.040 vs szn) |
| Runs per game | 5.00 (+0.921 vs szn) | 3.85 (-0.215 vs szn) |
| wOBA (model offense input) | 0.325 (+0.017 vs szn) | 0.286 (-0.017 vs szn) |
| K% (lower is better) | 24.0% (+0.8% vs szn) | 26.0% (+0.6% vs szn) |
Over the last 30 days the Mariners have been the better offense, 0.325 wOBA to 0.286. They are running hot against their own season line (+0.017 wOBA). Angels are striking out at 26.0% over the window — something the opposing starter can lean on.
Season profile
Full Stats page →| Metric | Mariners | Angels |
|---|---|---|
| Record | 70-80 | 56-93 |
| Run differential / game (team quality) | -0.40 | -0.49 |
| Runs scored / game (offense, season) | 4.08 | 4.07 |
| Runs allowed / game (defense, season, lower better) | 4.48 | 4.56 |
| Season OPS | 0.692 | 0.680 |
| K% season (lower is better) | 23.2% | 25.3% |
| OPS vs opposing hand (season) | 0.645 | 0.689 |
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. Mariners and Angels 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 | Mariners | Angels |
|---|---|---|
| Fatigue | 5.1/10, Normal | 5.8/10, Normal |
| Efficiency | 3.2/10, Below average | 4.7/10, Average |
| Combined risk | 6.0/10, Normal | 6.0/10, Normal |
| Relief innings, last 7 days | 19.3 | 20.0 |
| Back-to-back arms | 4 | 4 |
| 7-day ERA | 6.52 | 4.50 |
| 7-day WHIP | 1.60 | 1.40 |
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 0.8 runs below 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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