San Diego Padres vs Arizona Diamondbacks Picks and Prediction for Tuesday August 4 2026

The San Diego Padres will visit the Arizona Diamondbacks at Chase Field in Phoenix, Arizona, on Tuesday, August 4, 2026. The opening pitch is scheduled for 9:40 p.m. ET, with television coverage available through Padres.TV, DBacks.TV, and MLB.TV. At the time of this writing the odds were not released. Readers searching for additional betting analysis across Tuesday’s schedule can also check out our free MLB picks.

Starting Pitchers

San Diego had not announced its starting pitcher when this preview was completed. Arizona is expected to start Eduardo Rodriguez, who enters Tuesday with a 10-3 record, a 2.48 ERA, and 88 strikeouts. Rodriguez has provided the Diamondbacks with excellent run prevention and a consistently strong opportunity to win. Arizona therefore holds a substantial advantage in starting-pitching certainty, particularly with the Padres potentially requiring several pitchers to complete the game.

San Diego Arrives with Considerable Momentum

The Padres entered Monday with a 58-54 overall record after winning eight of their previous nine games. San Diego completed a three-game home sweep of San Francisco over the weekend, winning the series finale 5-4 Sunday. The Padres established an early four-run lead before surviving the Giants’ late rally, giving them another close victory during their best stretch of the season.

San Diego is batting .235 as a team with 472 runs, 866 hits, and 121 home runs. The Padres have recorded a .312 on-base percentage and a .384 slugging percentage. Those numbers do not represent an overwhelming offensive profile, but San Diego has combined timely power with excellent late-inning relief work. The Padres have repeatedly found ways to protect narrow advantages despite ranking behind Arizona in batting average, runs, hits, on-base percentage, and slugging percentage.

The key concern is the uncertainty surrounding San Diego’s starting pitcher. The Padres possess an elite late-inning option, but reaching that portion of the game with a lead may be difficult against an Arizona offence that has been productive since the All-Star break. San Diego also faces a starter carrying a 2.48 ERA, placing additional pressure on the visiting pitching staff to prevent Arizona from establishing an early advantage.

Arizona Looks to Rebound Behind Its Most Dependable Starter

The Diamondbacks entered Monday with a 59-53 overall record after taking two of three games from Cleveland. Arizona won the first two contests of the weekend before suffering a 5-0 defeat Sunday. The Diamondbacks managed only two hits in the finale and did not collect their first baserunner until the sixth inning. Despite that frustrating performance, Arizona had won 13 of its first 18 games following the All-Star break.

Arizona is batting .241 with 508 runs, 907 hits, and 107 home runs. The Diamondbacks have produced a .313 on-base percentage and a .392 slugging percentage. San Diego holds a 14-home-run advantage, but Arizona has scored 36 more runs while collecting 41 more hits. The Diamondbacks have also been one of the National League’s most productive offensive teams since the break, scoring 106 runs over their first 18 games.

Rodriguez provides Arizona with its clearest advantage Tuesday. His 10 victories and 2.48 ERA make him the strongest confirmed pitcher involved in the matchup. The Diamondbacks have scored 508 runs while allowing 506, leaving them with a narrow positive scoring differential. Arizona’s season-long margin is modest, but its recent offensive surge and Rodriguez’s pitching create an opportunity to respond immediately after Sunday’s shutout loss.

San Diego Padres vs Arizona Diamondbacks Picks and Prediction

Pick:

• Arizona Diamondbacks -1.5

I am taking Arizona on the run line because Rodriguez gives the Diamondbacks a significant starting-pitching advantage. He enters with a 10-3 record and a 2.48 ERA, while San Diego had not confirmed its starter when this preview was completed. The Padres are playing extremely well and have won eight of nine, making them dangerous at an underdog price. However, Arizona has also been strong since the All-Star break and owns season-long advantages in runs, hits, batting average, on-base percentage, and slugging percentage. I would play Diamondbacks -1.5 at plus money, although Arizona’s moneyline would be the safer option if the run-line price is not attractive.

Pick:

• Under 9

I am leaning under if the total is set at 9 runs. Rodriguez has consistently limited opponents and now faces a San Diego lineup batting only .235 with a .384 slugging percentage. The Padres have relied upon close victories during their recent surge, and their strong late-inning relief work gives them a chance to control the scoring once the game reaches the bullpen. San Diego’s unannounced starter creates uncertainty, but Arizona was shut out Sunday and may need time to rediscover its offensive rhythm. Under 9 provides valuable push protection, while a reduction to 8 would leave insufficient room for error.

This game preview was written before game play on Monday.