MLB matchup analysis
Athletics vs Diamondbacks Prediction, Odds and Model Pick
Wednesday, July 22, 2026 at Chase Field · 3:40 PM ET
LyDia decision: Pass on Athletics vs Diamondbacks
The case for Arizona Diamondbacks
Why it is not official
Read the full model output
Starting pitcher edge conflicts with the model side.
Game information
| Matchup | Athletics at Arizona Diamondbacks |
|---|---|
| Date | Wednesday, July 22, 2026 |
| First pitch | 3:40 PM ET |
| Venue | Chase Field |
| Starting pitchers | Gage Jump vs Merrill Kelly |
| Weather | Game-time forecast: 103°F, 1% precipitation chance, 3 mph wind from NW. This venue has a roof, but the roof status is not confirmed. |
Starting pitcher matchup
Full Pitcher Matchup Tool →| Metric | Athletics | Diamondbacks |
|---|---|---|
| Probable pitcher | Gage Jump | Merrill Kelly |
| Throws | L | R |
| LyDia pitcher score (higher is better) | 64 | 49 |
| ERA (lower is better) | 3.78 | 5.20 |
| WHIP (lower is better) | 1.32 | 1.49 |
| K/9 (higher is better) | 9.6 | 5.7 |
| BB/9 (lower is better) | 2.9 | 3.6 |
| K-BB% (higher is better) | 17.6% | 5.1% |
| HR/9 (lower is better) | 0.7 | 1.9 |
| Ground-ball rate | 37.6% | 46.4% |
| IP per start (higher is better) | 5.2 | 5.8 |
Pitcher edge: Athletics by 15 points.
How to read this: highlighted cells mark a gap big enough to matter, not just any difference. K-BB% is strikeouts minus walks per batter faced, one of the most predictive skill stats in pitching. HR/9 is home runs allowed per nine innings. Ground-ball rate is neither good nor bad on its own: high ground-ball pitchers trade strikeouts for double plays and fewer home runs.
Strikeout projections Full K board →
Projections are self-calibrated against graded results (59 graded starts). Leans are context, not official picks.
Same data source as the Pitcher Matchup Tool, where every starter on the slate is compared side by side.
Recent form
Full Stats page →| Metric | Athletics | Diamondbacks |
|---|---|---|
| Record | 43-58 | 52-49 |
| Last 10 | 2-8 | 7-3 |
| Run differential / game (team quality) | -1.11 | Not available |
| Runs scored / game (offense) | 4.49 | Not available |
| Runs allowed / game (defense, lower better) | 5.59 | Not available |
| OPS, last 15 days | 0.700 | 0.716 |
| Season OPS | 0.731 | 0.694 |
| OPS change | -0.031 | +0.022 |
| Runs per game, last 15 days | 3.4 | 5.1 |
| K% season (lower is better) | 22.8% | 19.6% |
| K% last 15 days | 24.7% | 21.2% |
| OPS vs opposing hand | 0.727 | 0.765 |
Run differential and run environment come from the season standings; offense splits for all 30 teams live on the Stats page, including hot and cold streaks and the run environment table.
The Map
Full interactive map →Every team on today's slate, on any two axes you pick. Athletics and Diamondbacks 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 | Athletics | Diamondbacks |
|---|---|---|
| Fatigue | 8.3/10, High risk | 8.6/10, High risk |
| Efficiency | 5.0/10, Average | 4.6/10, Average |
| Combined risk | 8.3/10, High risk | 8.8/10, High risk |
| Relief innings, last 3 days | 13.0 | 16.7 |
| Back-to-back arms | 3 | 4 |
| 3-day ERA | 3.46 | 4.32 |
| 3-day WHIP | 1.62 | 1.50 |
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 1.5 runs above the market total. This projection is matchup context, not an official total pick unless LyDia explicitly labels it as one.
More games today
All matchups →What could change the prediction
- A listed starting pitcher is scratched or replaced.
- The moneyline moves enough to remove the current model edge.
- A confirmed lineup materially changes the offensive matchup.
- Late bullpen availability differs from the recent workload data.
- Weather or roof conditions change before first pitch.
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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.