MLB matchup analysis
Giants vs Pirates Prediction, Odds and Model Pick
Wednesday, September 2, 2026 at PNC Park · 6:40 PM ET
LyDia decision: Pass on Giants vs Pirates
The case for San Francisco Giants
The case for Pittsburgh Pirates
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
Giants 5, Pirates 4
How the analysis held up
San Francisco Giants won, the side LyDia's model favored.
Landen Roupp (San Francisco Giants), the starter LyDia's pitcher score favored, actually outpitched Bubba Chandler: 5.0 IP, 1 ER (1.80 ERA) against 5.0 IP, 3 ER (5.40 ERA). The edge held up.
The San Francisco Giants bullpen was flagged as elevated risk pregame (High risk). In relief it actually allowed 2 earned runs over 5.0 innings (3.60 ERA) — the risk read did not show up on the scoreboard tonight. Note: 1 of the runs charged to the San Francisco Giants pitching staff overall was unearned — not something the bullpen's stuff should be blamed for.
The Pittsburgh Pirates bullpen was flagged as elevated risk pregame (Tired). In relief it actually allowed 1 earned run over 5.0 innings (1.80 ERA) — the risk read did not show up on the scoreboard tonight. Note: 1 of the runs charged to the Pittsburgh Pirates pitching staff overall was unearned — not something the bullpen's stuff should be blamed for.
San Francisco Giants scored 5 in a game that went 10 innings — not compared against the 4 pregame projection, which assumed nine.
Pittsburgh Pirates scored 4 in a game that went 10 innings — not compared against the 4 pregame projection, which assumed nine.
Game information
| Matchup | San Francisco Giants at Pittsburgh Pirates |
|---|---|
| Date | Wednesday, September 2, 2026 |
| First pitch | 6:40 PM ET |
| Venue | PNC Park |
| Starting pitchers | Landen Roupp vs Bubba Chandler |
| Weather | Game-time forecast: 88°F, 10% precipitation chance, 6 mph wind from S. |
Starting pitcher matchup
Full Pitcher Matchup Tool →| Metric | Giants | Pirates |
|---|---|---|
| Pitching plan | Traditional starter | Traditional starter |
| Expected innings | 5⅓ | 5 |
| Throws | R | R |
| LyDia pitcher score (higher is better) | 62 | 58 |
| ERA (lower is better) | 4.17 | 4.30 |
| WHIP (lower is better) | 1.29 | 1.37 |
| K/9 (higher is better) | 8.5 | 8.0 |
| K-BB% (higher is better) | 11.2% | 8.4% |
| K% (higher is better) | 22.3% | 20.4% |
| BB% (lower is better) | 11.1% | 12.0% |
| BB/9 (lower is better) | 4.2 | 4.7 |
| HR/9 (lower is better) | 0.7 | 0.8 |
| Ground-ball rate | 57.2% | 43.9% |
| Fly-ball rate | 42.8% | 56.1% |
Pitcher edge: LyDia gives Landen Roupp a 4-point edge over Bubba Chandler, driven mainly by K-BB% (11.2% vs 8.4%) and BB/9 (4.2 vs 4.7).
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 →Both sides arrive in similar form. Giants are 5-5 in their last 10 and averaging 4.7 runs per game over the last 15 days; Pirates are 5-5 in their last 10 and averaging 3.7 runs per game over the last 15 days. On the season Pirates carry the better run differential per game (+0.19 against -0.50).
| Metric | Giants | Pirates |
|---|---|---|
| Last 10 | 5-5 | 5-5 |
| Last 10 by venue (away team on the road, home team at home) | 3-7 on the road | 6-4 at home |
| OPS, last 15 days | 0.739 | 0.654 |
| wOBA, last 15 days (hot/cold read) | 0.327 | 0.295 |
| Runs per game, last 15 days | 4.7 | 3.7 |
| K% last 15 days (lower is better) | 24.4% | 27.2% |
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 | Giants | Pirates |
|---|---|---|
| OPS | 0.680 (-0.036 vs szn) | 0.662 (-0.073 vs szn) |
| Runs per game | 4.07 (-0.100 vs szn) | 4.00 (-0.900 vs szn) |
| wOBA (model offense input) | 0.302 (-0.012 vs szn) | 0.297 (-0.028 vs szn) |
| K% (lower is better) | 22.8% (+1.6% vs szn) | 26.5% (+2.1% vs szn) |
Over the last 30 days the Giants have been the better offense, 0.302 wOBA to 0.297. They are cooling off against their own season line (-0.012 wOBA). Pirates are striking out at 26.5% over the window — something the opposing starter can lean on.
Season profile
Full Stats page →| Metric | Giants | Pirates |
|---|---|---|
| Record | 57-82 | 68-71 |
| Run differential / game (team quality) | -0.50 | +0.19 |
| Runs scored / game (offense, season) | 4.17 | 4.90 |
| Runs allowed / game (defense, season, lower better) | 4.67 | 4.71 |
| Season OPS | 0.716 | 0.736 |
| K% season (lower is better) | 21.3% | 24.5% |
| OPS vs opposing hand (season) | 0.738 | 0.760 |
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. Giants and Pirates 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 | Giants | Pirates |
|---|---|---|
| Fatigue | 8.5/10, High risk | 7.5/10, Tired |
| Efficiency | 1.6/10, Struggling | 4.8/10, Average |
| Combined risk | 10.0/10, High risk | 7.6/10, Tired |
| Relief innings, last 7 days | 31.0 | 20.7 |
| Back-to-back arms | 4 | 7 |
| 7-day ERA | 8.13 | 4.35 |
| 7-day WHIP | 1.97 | 1.35 |
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 and market are close. Team totals remain research-only until their graded sample is established.
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