MLB matchup analysis
Diamondbacks vs Giants Prediction, Odds and Model Pick
Thursday, August 27, 2026 at Oracle Park · 9:45 PM ET
LyDia decision: Pass on Diamondbacks vs Giants
Lab Rating
3.4/10
Model lean
Giants 70.4%
Market probability
47.0%
Model edge
+23.4%
Best moneyline
+111
Sportsbooks checked
9
The case for San Francisco Giants
Starting pitcher edge: 19 points
LyDia gives Landen Roupp a 19-point edge over Jose Cabrera, driven mainly by HR/9 (0.66 vs 1.86) and expected innings (5.3 vs 3.9).
The case for Arizona Diamondbacks
Late-inning bullpen advantage
San Francisco Giants relievers have a 3.51 ERA over the last 7 days; Arizona Diamondbacks relievers have a 3.57. If this is still close after six innings, that gap favors Arizona Diamondbacks.
Their bats are hot: +0.019 wOBA
Arizona Diamondbacks is outhitting its own season form over the last 15 days.
Team strength favors Arizona Diamondbacks
Before any pitcher or bullpen adjustment, LyDia's own team-strength model has Arizona Diamondbacks ahead (49.5% to 41.9%). The pick still comes from San Francisco Giants once the pitcher and bullpen terms are applied.
Why it is not official
Setup quality below the bar
Lab Rating is 3.4/10, under the 7.2/10 required for an official pick.
Own bullpen carries risk: 8.3/10
The San Francisco Giants bullpen comes in high risk. A lead after six innings is less safe than usual.
Opponent is swinging it
The other lineup is +0.019 wOBA above its season form over the last 15 days.
Why the setup score is what it is
Conviction: 7.7/10
LyDia's win probability for San Francisco Giants (70.4%) is well clear of a coin flip -- this is a real, stated lean, not a guess.
Pitching plan: 10/30
Landen Roupp rates 61 on LyDia's pitcher score, judged on its own merits (50-80 is the credited range). Average or below by that measure, so it earns little or none of the available credit here -- independent of who the opponent is throwing.
Bullpen: 2.19/10
LyDia does not see a meaningful bullpen edge for San Francisco Giants here.
Offense: 14.5/50
San Francisco Giants's recent form does not clearly outpace Arizona Diamondbacks's.
Why the price is what it is
Team strength: 41.9%
Before any pitcher or bullpen adjustment, LyDia's team-strength model alone makes San Francisco Giants 41.9% to win. Everything below moves the price from this starting point.
Pitcher score gap: 18 points
The pitcher-score gap favors San Francisco Giants by 18 points. This is the biggest single mover of the price -- a large gap moves it a lot, a small gap barely moves it.
Bullpen adjustment: -0.084
The bullpen-fatigue gap between the two pens nudges the price toward Arizona Diamondbacks. This moves the price less than the starting pitchers do, since a starter covers more of the game than the bullpen.
Net effect: 41.9% -> 70.4%
Team strength alone had San Francisco Giants at 41.9%. After the pitcher and bullpen terms, the price is 70.4% -- the same number shown as Model Lean above.
LyDia Coach — consistency check
Evidence check: Lab Rating's conviction component score
Today's number here (7.70) falls in the second quarter of LyDia's historical range -- the weaker end of this angle. Across 340 analyzed games, this input has shown a modest relationship to winning (r=0.108). In that quarter, LyDia's record is 45-40 (52.9%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: LyDia's own win probability for this pick
Today's number here (0.70) falls in the top quarter of LyDia's historical range -- the stronger end of this angle. Across 340 analyzed games, this input has shown little to no relationship to winning (r=0.099). In that quarter, LyDia's record is 53-32 (62.4%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Size of the price (how big a favorite or underdog this pick was)
Today's number here (111.00) falls in the bottom quarter of LyDia's historical range -- the stronger end of this angle. Across 334 analyzed games, this input has shown little to no relationship to winning (r=-0.068). In that quarter, LyDia's record is 46-37 (55.4%, n=83). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Lab Rating's offense component score
Today's number here (14.50) falls in the second quarter of LyDia's historical range -- the weaker end of this angle. Across 340 analyzed games, this input has shown little to no relationship to winning (r=0.061). In that quarter, LyDia's record is 45-40 (52.9%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Probability points bullpen risk moved this pick's number
Today's number here (-0.08) falls in the bottom quarter of LyDia's historical range -- the stronger end of this angle. Across 340 analyzed games, this input has shown little to no relationship to winning (r=-0.056). In that quarter, LyDia's record is 52-33 (61.2%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Bullpen risk edge (positive = the picked side's bullpen is the safer one)
Today's number here (-28.00) falls in the bottom quarter of LyDia's historical range -- the stronger end of this angle. Across 340 analyzed games, this input has shown little to no relationship to winning (r=-0.056). In that quarter, LyDia's record is 52-33 (61.2%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Team strength blend edge, before any pitcher/bullpen adjustment (picked side minus opponent)
Today's number here (-0.08) falls in the bottom quarter of LyDia's historical range -- the weaker end of this angle. Across 195 analyzed games, this input has shown little to no relationship to winning (r=0.053). In that quarter, LyDia's record is 27-21 (56.3%, n=48). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Lab Rating's bullpen component score
Today's number here (2.19) falls in the bottom quarter of LyDia's historical range -- the stronger end of this angle. Across 340 analyzed games, this input has shown little to no relationship to winning (r=-0.047). In that quarter, LyDia's record is 53-32 (62.4%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Lab Rating (LyDia's own analysis-quality score for this pick)
Today's number here (34.00) falls in the bottom quarter of LyDia's historical range -- the weaker end of this angle. Across 340 analyzed games, this input has shown little to no relationship to winning (r=0.033). In that quarter, LyDia's record is 51-34 (60.0%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Model edge over the market (model prob minus no-vig market prob)
Today's number here (0.23) falls in the top quarter of LyDia's historical range -- the weaker end of this angle. Across 334 analyzed games, this input has shown little to no relationship to winning (r=-0.031). In that quarter, LyDia's record is 49-36 (57.6%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Offense wOBA edge, last 15 days (picked side minus opponent)
Today's number here (-0.02) falls in the bottom quarter of LyDia's historical range -- the weaker end of this angle. Across 264 analyzed games, this input has shown little to no relationship to winning (r=0.021). In that quarter, LyDia's record is 33-33 (50.0%, n=66). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Lab Rating's pitcher-edge component score
Today's number here (10.00) falls in the third quarter of LyDia's historical range -- the weaker end of this angle. Across 340 analyzed games, this input has shown little to no relationship to winning (r=-0.014). In that quarter, LyDia's record is 45-40 (52.9%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Starting pitcher score edge (picked side minus opponent)
Today's number here (18.00) falls in the third quarter of LyDia's historical range -- the weaker end of this angle. Across 340 analyzed games, this input has shown little to no relationship to winning (r=-0.013). In that quarter, LyDia's record is 49-36 (57.6%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Lab Rating's pitching-plan component score
Today's number here (10.00) falls in the second quarter of LyDia's historical range -- the stronger end of this angle. Across 340 analyzed games, this input has shown little to no relationship to winning (r=-0.011). In that quarter, LyDia's record is 51-34 (60.0%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Evidence check: Picked team's own bullpen fatigue score (regardless of the opponent's)
Today's number here (83.00) falls in the top quarter of LyDia's historical range -- the stronger end of this angle. Across 340 analyzed games, this input has shown little to no relationship to winning (r=0.004). In that quarter, LyDia's record is 49-36 (57.6%, n=85). A review note only -- not a reason to skip or fade this pick on its own.
Review prompts only, from LyDia's own official-pick history. Not a signal to skip or fade this pick.
The verdict LyDia passes. The combined Lab Rating did not clear the official threshold.
Read the full model output
The combined Lab Rating did not clear the official threshold.
Final result
Diamondbacks 1, Giants 6
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 Jose Cabrera: 5.0 IP, 1 ER (1.80 ERA) against 4.1 IP, 2 ER (4.15 ERA). The edge held up.
The Arizona Diamondbacks bullpen was not flagged pregame, but it had a night worth noting: 4 earned runs allowed over 3.2 relief innings (9.82 ERA) — quietly worse than the pregame read implied.
The San Francisco Giants bullpen was flagged as elevated risk pregame (High risk). In relief it actually allowed 0 earned runs over 4.0 innings (0.00 ERA) — the risk read did not show up on the scoreboard tonight.
Arizona Diamondbacks scored 1, 2.8 fewer than the 3.8 pregame projection.
San Francisco Giants scored 6, 2 more than the 4 pregame projection.
Game information
| Matchup | Arizona Diamondbacks at San Francisco Giants |
|---|---|
| Date | Thursday, August 27, 2026 |
| First pitch | 9:45 PM ET |
| Venue | Oracle Park |
| Starting pitchers | Jose Cabrera vs Landen Roupp |
| Weather | Game-time forecast: 64°F, 2% precipitation chance, 13 mph wind from NW. |
Starting pitcher matchup
Full Pitcher Matchup Tool →| Metric | Diamondbacks | Giants |
|---|---|---|
| Pitching plan | Limited starter | Traditional starter |
| Expected innings | 4 | 5⅓ |
| Throws | R | R |
| LyDia pitcher score (higher is better) | 42 | 61 |
| ERA (lower is better) | 5.59 | 4.28 |
| WHIP (lower is better) | 1.55 | 1.30 |
| K/9 (higher is better) | 7.0 | 8.6 |
| K-BB% (higher is better) | 7.9% | 11.2% |
| K% (higher is better) | 16.9% | 22.4% |
| BB% (lower is better) | 9.0% | 11.2% |
| BB/9 (lower is better) | 3.7 | 4.3 |
| HR/9 (lower is better) | 1.9 | 0.7 |
| Ground-ball rate | 42.9% | 59.0% |
| Fly-ball rate | 57.1% | 41.0% |
Pitcher edge: LyDia gives Landen Roupp a 19-point edge over Jose Cabrera, driven mainly by HR/9 (0.66 vs 1.86) and expected innings (5.3 vs 3.9).
How to read this: the scorecards above name the starters; every number lives in this table.
Strikeout Projections Full strikeout projections →
Jose Cabrera strikeouts
4.3 LyDia projected Ks
Qualifying projection: OVER 3.5K · +0.8K difference
Market 3.5K · O -113 / U -113 · 1 book
Landen Roupp strikeouts
3.6 LyDia projected Ks
Qualifying projection: UNDER 4.5K · -0.9K difference
Market 4.5K · O -104 / U -122 · 1 book
Same data source as the Pitcher Matchup Tool, where every starter on the slate is compared side by side.
Recent form
Full Stats page →Diamondbacks are 5-5 in their last 10 and averaging 4.4 runs per game over the last 15 days; Giants are 3-7 in their last 10 and averaging 3.7 runs per game over the last 15 days. On the season Diamondbacks carry the better run differential per game (+0.00 against -0.51).
| Metric | Diamondbacks | Giants |
|---|---|---|
| Last 10 | 5-5 | 3-7 |
| Last 10 by venue (away team on the road, home team at home) | 5-5 on the road | 5-5 at home |
| OPS, last 15 days | 0.760 | 0.712 |
| wOBA, last 15 days (hot/cold read) | 0.334 | 0.314 |
| Runs per game, last 15 days | 4.4 | 3.7 |
| K% last 15 days (lower is better) | 17.8% | 23.7% |
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 | Diamondbacks | Giants |
|---|---|---|
| OPS | 0.741 (+0.028 vs szn) | 0.674 (-0.040 vs szn) |
| Runs per game | 4.46 (-0.025 vs szn) | 3.82 (-0.253 vs szn) |
| wOBA (model offense input) | 0.326 (+0.011 vs szn) | 0.299 (-0.014 vs szn) |
| K% (lower is better) | 18.6% (-0.6% vs szn) | 22.3% (+1.0% vs szn) |
Over the last 30 days the Diamondbacks have been the better offense, 0.326 wOBA to 0.299. They are running hot against their own season line (+0.011 wOBA).
Season profile
Full Stats page →| Metric | Diamondbacks | Giants |
|---|---|---|
| Record | 71-63 | 54-79 |
| Run differential / game (team quality) | +0.00 | -0.51 |
| Runs scored / game (offense, season) | 4.49 | 4.07 |
| Runs allowed / game (defense, season, lower better) | 4.49 | 4.59 |
| Season OPS | 0.715 | 0.714 |
| K% season (lower is better) | 19.1% | 21.3% |
| OPS vs opposing hand (season) | 0.685 | 0.736 |
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. Diamondbacks and Giants are highlighted.
Bullpen matchup
Full Bullpen Fatigue Index →Diamondbacks
Combined risk
5.5 Normal
Fatigue
5.8 Normal
Efficiency
5.6 Effective
Giants
Combined risk
8.3 High risk
Fatigue
8.4 High risk
Efficiency
5.2 Average
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 | Diamondbacks | Giants |
|---|---|---|
| Fatigue | 5.8/10, Normal | 8.4/10, High risk |
| Efficiency | 5.6/10, Effective | 5.2/10, Average |
| Combined risk | 5.5/10, Normal | 8.3/10, High risk |
| Relief innings, last 7 days | 22.7 | 33.3 |
| Back-to-back arms | 4 | 4 |
| 7-day ERA | 3.57 | 3.51 |
| 7-day WHIP | 1.15 | 1.41 |
Fatigue measures workload. Efficiency measures recent run prevention. Combined risk is what the moneyline and totals systems use.
Run total projection
Full Totals Projections →LyDia projection
8.3
Market total
8.0
Projected away runs
3.8
Projected home runs
4.0
Over price
-104
Under price
-110
Arizona Diamondbacks team total
3.8 projected
Line 3.5 · O -135 / U +114
No team-total lean
San Francisco Giants team total
4.0 projected
Line 3.5 · O -113 / U -103
No team-total lean
The model and market are close. Team totals remain research-only until their graded sample is established.
More games today
All matchups →Every LyDia pick, graded in public
Free daily model card by email, or open today's full slate. Membership adds delivery before first pitch.
Model outputs are not guarantees. LyDia provides analysis and education only. Every official pick remains visible on the Results page. 21+. If you or someone you know has a gambling problem, call 1-800-GAMBLER.