San Diego Padres vs Arizona Diamondbacks Final Score and Odds Recap, August 4, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
Padres | -1.5 — | O 1.5 1% | 99% | 99% Kalshi |
Diamondbacks | +1.5 — | U 1.5 — | 2% | 2% Kalshi |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
San Diego Padres | -1.5 — | O 1.5 | 99% Kalshi | |
Arizona Diamondbacks | +1.5 — | U 1.5 — | 2% Kalshi |
San Diego won 9-4 at Chase Field and the market was on the wrong side of it. Arizona was priced as the 55c home favorite on both Kalshi and Polymarket before first pitch, with San Diego at 47c on the road, and the Padres scored six runs in the first two innings against Eduardo Rodriguez. The game board carried $6.9M in cumulative cross-platform volume, and the San Diego moneyline settled at 100c.
San Diego won 9-4 at Chase Field on August 4, 2026, and the prediction market spent the whole night on the wrong side. Arizona closed as the 55c home favorite (55c on Kalshi, 55c on Polymarket) against San Diego at 47c, an implied 55% to 47% read carrying the standard two-sided vig. The Padres put up three runs in the first inning and three more in the second, and Arizona did not score until the seventh. A 55c favorite is a lean, not a lock, so the losing side by itself is unremarkable. The five-run margin is what makes this a genuine miss: the market priced a close game between two clubs separated by two games in the standings and got a road blowout instead.
Padres vs Diamondbacks Final Score and How the Game Went
The Padres vs Diamondbacks final score was 9-4, San Diego. The Padres batted around in the first on a Manny Machado double that scored Fernando Tatis Jr., a Jackson Merrill single that scored Machado, and a Xander Bogaerts single that scored Merrill. Three more followed in the second, with Machado singling home Jase Bowen and Tatis Jr., then Merrill driving in Luis Rengifo. Eduardo Rodriguez, who entered at 10-4 with a 2.71 ERA (eighth in MLB), lasted 5.2 innings and gave up 11 hits and seven runs, five earned.
Randy Vasquez threw six scoreless innings for San Diego on two hits and one walk and took the win after entering at 7-6 with a 4.19 ERA. Arizona's only scoring came in the bottom of the seventh against German Marquez, when Nolan Arenado homered 400 feet to left center to score Jorge Barrosa and James McCann followed with a 395-foot home run that scored Tim Tawa. That four-run inning cut the deficit to 8-4 and no closer. Jake Cronenworth singled home Sung-Mun Song in the ninth for the final run. San Diego finished with 16 hits to Arizona's six and committed no errors to Arizona's one, with Machado going 3-for-5 with four RBI in front of 20,839 at Chase Field.
What the Padres vs Diamondbacks Market Priced Before First Pitch
Arizona was the 55c side on both venues, and the cross-platform agreement was unusually tight: Kalshi 55c, Polymarket 55c, zero spread between the books. There was no relative-value edge on the moneyline for anyone shopping between them. San Diego traded at 47c. Sportsbook pricing agreed with the exchanges, with Arizona listed at -118, San Diego at +111, and a game total of 9.0 runs.
That price was defensible on the inputs. Arizona entered the night at 60-53 holding the third National League wild card spot, San Diego entered at 58-55 and two games back of it, and both were chasing the Los Angeles Dodgers in the National League West. Arizona also had the pitching edge on paper, a 2.71 ERA starter ranked eighth in the majors against a 4.19 ERA opponent, plus a 32-23 home record. The result respected none of it. Rodriguez allowed more runs in the start (seven) than Vasquez allowed hits through six innings (two).
How the Padres vs Diamondbacks Market Settled
The San Diego moneyline settled at 100c on both Kalshi and Polymarket and Arizona settled at 0c. The alternate spread ladder pins the margin exactly: San Diego -1.5 and San Diego -4.5 both settled at 100c, while San Diego -5.5 settled at 0c, which is the signature of a five-run win. The total went over comfortably. Kalshi's ladder resolved yes through over 12.5 runs and no at over 13.5, consistent with 13 combined runs against a pre-game sportsbook total of 9.0. The run-in-the-first-inning market, priced at 99c late, resolved yes on the Machado double.
Props followed the game script. Nolan Arenado over 0.5 home runs settled at 100c and Eduardo Rodriguez over 3.5 strikeouts settled at 100c on his four punchouts, while Fernando Tatis Jr. over 1.5 home runs settled at 1c. The moneyline alone carried $3.1M of the board's cumulative volume on the Arizona side and $1.5M on the San Diego side, and the pair was verified cross-platform on both books. For the rest of the four-game set, the August 5 rematch in Phoenix is the next price to watch.
Key Padres vs Diamondbacks Takeaways
Six runs in two innings: San Diego scored three in the first and three in the second, and the 55c favorite never led at any point in the game.
Rodriguez regressed hard: Arizona's starter carried a 2.71 ERA, eighth in MLB, into the outing and allowed 11 hits and seven runs in 5.2 innings.
Vasquez was the difference: six scoreless innings on two hits from a 4.19 ERA starter is the single input the pre-game price could not have modeled.
Machado carried the offense: 3-for-5 with four RBI, driving in runs in the first, second, and sixth innings.
The total was mispriced too: 13 combined runs cleared the 9.0 posted number by four, and the Kalshi over ladder settled yes all the way through 12.5.
The standings moved one game: San Diego closed to 59-55 against Arizona's 60-54, cutting the gap in the wild card chase from two games to one.
Related Padres vs Diamondbacks Markets
The series continued in Phoenix, and the August 5 Padres vs Diamondbacks game reset the price with the series tied 1-1 after Arizona took the August 3 opener. Team-level pricing across the rest of the schedule lives on the San Diego Padres and Arizona Diamondbacks hubs, and the full slate of daily moneylines, run lines, and totals is on the MLB prediction markets page.
Resolution Criteria
The moneyline resolved to San Diego, which won 9-4 at Chase Field on the night of August 4, 2026, local start 9:40pm ET. San Diego contracts settled at 100c and Arizona contracts at 0c on both Kalshi and Polymarket, with each winning share paying $1. Run-line and total contracts settled off the same final score: San Diego -1.5 through -4.5 resolved yes on the five-run margin, San Diego -5.5 and beyond resolved no, and total-runs contracts resolved yes through over 12.5 and no at over 13.5 on 13 combined runs. First-five-inning and player-prop contracts settled off official MLB box-score results for the same game. Had the game been suspended or postponed before becoming official, platform-specific void rules would have applied instead.
Key Factors
- San Diego scored six runs across the first two innings against a 2.71 ERA starter
- Eduardo Rodriguez allowed 11 hits and seven runs in 5.2 innings for Arizona
- Randy Vasquez threw six scoreless innings on two hits for the San Diego win
- Manny Machado went 3-for-5 with four RBI and drove in runs in three separate innings
- 13 combined runs cleared the 9.0 pre-game total by four runs
- San Diego cut the wild card gap on Arizona from two games to one at 59-55 versus 60-54
Who won the Padres vs Diamondbacks game on August 4, 2026?
San Diego won 9-4 at Chase Field in Phoenix. The Padres led 6-0 after two innings and Arizona did not score until a four-run seventh.
What was the final score of Padres vs Diamondbacks?
The final score was San Diego 9, Arizona 4. San Diego out-hit Arizona 16 to 6 and committed no errors.
Was Arizona favored in the Padres vs Diamondbacks prediction market?
Yes. Arizona was the 55c home favorite on both Kalshi and Polymarket before first pitch, with San Diego at 47c, an implied 55% to 47% read. The 47c underdog won by five runs.
How did the Padres vs Diamondbacks market settle?
San Diego moneyline contracts settled at 100c and Arizona contracts at 0c on both platforms. San Diego -4.5 settled at 100c and San Diego -5.5 at 0c, pinning the five-run margin.
Did the Padres vs Diamondbacks total go over?
Yes. The two teams combined for 13 runs against a pre-game sportsbook total of 9.0. Kalshi over contracts resolved yes through 12.5 runs and no at 13.5.
What did the result change in the standings?
San Diego moved to 59-55 and Arizona fell to 60-54, cutting San Diego's deficit in the National League wild card chase from two games to one with both clubs behind the Los Angeles Dodgers in the NL West.