Cincinnati Reds vs Seattle Mariners Prediction
Expert prediction, odds analysis, and best bet for Cincinnati Reds vs Seattle Mariners on July 21, 2026.
Win Probability
Best Bet
Current Odds
API-Sports| Team | Moneyline | Run Line | Total | Impl. Prob. |
|---|---|---|---|---|
Cincinnati RedsAway | +125 | -175 | -114 | 44% |
Seattle MarinersHome | -149 | +145 | -109 | 60% |
Additional Full-Game Markets
First 5 Innings (F5)
Statistical Analysis
- 1
Seattle Mariners project 4.3 runs: 4.0 RF/G offense vs 4.4 RA/G Cincinnati Reds pitching.
- 2
Seattle Mariners season record: 51–50 (51% win rate).
- 3
Cincinnati Reds season record: 45–54 (46% win rate).
- 4
Seattle Mariners home: 4.0 RF/G, 3.4 RA/G (58% home win rate).
- 5
Seattle Mariners last 5: 3.8 RF/G, 4.2 RA/G (1d rest, 3 G last 7d).
- 6
Moneyline edge vs market: -7.2%.
How This Prediction Was Made
Show model inputs ▼
Team Data Inputs
| Metric | Reds | Mariners |
|---|---|---|
| Season Win% | 45.5% | 50.5% |
| Games Played | 99 | 101 |
| Season RF/G | 4.21 | 4.02 |
| Season RA/G | 4.39 | 3.89 |
| Run Diff/G | -0.18 | 0.13 |
| Last-5 RF/G | 4.30 | 3.80 |
| Last-5 RA/G | 4.30 | 4.20 |
| Venue RF/G | 4.21 | 3.98 |
| Venue RA/G | 4.39 | 3.40 |
| Venue Win% | 45.5% | 58.0% |
| Form (last-5) | 3/5 W | 3/5 W |
| Rest Days | 1 | 1 |
| Games (Last 7d) | 0 | 3 |
| Data Quality | 15% | 100% |
Run Projection Formula
Projected runs = weighted blend of offense + opponent defense (season & recent) + venue split.
| Component | Value | Wt | Contrib |
|---|---|---|---|
| Season RF/G | 4.21 | 30% | 1.263 |
| Opp Season RA/G | 3.89 | 30% | 1.167 |
| Recent RF/G (5G) | 4.30 | 15% | 0.645 |
| Opp Recent RA/G | 4.20 | 15% | 0.630 |
| Venue RF/G | 4.21 | 5% | 0.211 |
| Opp Venue RA/G | 3.40 | 5% | 0.170 |
| Projected runs | 4.1 | ||
| Component | Value | Wt | Contrib |
|---|---|---|---|
| Season RF/G | 4.02 | 30% | 1.206 |
| Opp Season RA/G | 4.39 | 30% | 1.317 |
| Recent RF/G (5G) | 3.80 | 15% | 0.570 |
| Opp Recent RA/G | 4.30 | 15% | 0.645 |
| Venue RF/G | 3.98 | 5% | 0.199 |
| Opp Venue RA/G | 4.39 | 5% | 0.220 |
| Home bonus | 0.12 | — | 0.120 |
| Projected runs | 4.3 | ||
Win Probability Blend (Home)
Three signals are blended to produce the final home win probability.
| Signal | Prob | Weight | Contribution |
|---|---|---|---|
| Run margin (projected score diff) | 52.0% | 65% | 33.80% |
| Team strength (win% + venue) | 54.4% | 25% | 13.60% |
| Recent form (last-5 W/L) | 53.0% | 10% | 5.30% |
| Final home win probability | 53% | ||
Confidence Score Breakdown
| Factor | Points |
|---|---|
| Base (win probability distance from 50%) | +52 |
| Run margin bonus (larger margin = more predictable) | +0.8 |
| Data quality adjust (more game history = tighter estimates) | +1.5 |
| Form agreement (recent form aligns with season record) | +5 |
| Market odds available (confirms edge vs vig) | 0 |
| Final confidence score (medium) | 59 |
Market Edge Analysis
Edge = model probability minus market-implied probability. Positive edge = model sees value vs the book.
| Bet Type | Edge | Signal |
|---|---|---|
| Moneyline | -7.2% | ✓ fade |
| Run Line (-1.5) | -8.8% | ✓ fade |
| Over/Under | +3.7% | no edge |
| Mariners Team Total | +0.9% | no edge |
| Reds Team Total | +6.6% | ✓ value |
| F5 Moneyline | +1.2% | no edge |
| F5 Over/Under | +2.0% | no edge |
4%+ edge threshold required for a value bet recommendation.
Cincinnati Reds vs Seattle Mariners Prediction — Expert Analysis
Our model projects Seattle Mariners to win this matchup with a 53% win probability. The predicted final score is Reds 4.1 – Mariners 4.3.
Cincinnati Reds come into this game with a 45-54 record, good for a 45.5% winning percentage.
Seattle Mariners are 51-50 at home this season, with a 50.5% overall win rate. Home field advantage gives them an additional 3-4% boost to their projected win probability.
Our best bet for this matchup is the Cincinnati Reds Team Total Over 3.5, which carries a medium confidence rating based on current statistical inputs.