Padres vs Diamondbacks prediction: picks and odds for July 9
DIRECT ANSWER: The San Diego Padres are home favorites (-117 to -121) against the Arizona Diamondbacks on Thursday, July 9, 2026, at Petco Park. Covers.com backs the Padres on the moneyline and the under 8.5 runs, citing Merrill Kelly's contact struggles and Griffin Canning's recent improvement against a cold Arizona offense.
The Padres and Diamondbacks close a four-game set at Petco Park with both clubs hovering near .500 in a tight NL West race. San Diego enters the finale at 46-46; Arizona sits at 45-47. For more offbeat sports angles, browse our Bizarre World coverage.
Key Takeaways
- Covers.com picks the Padres moneyline (-121), playable up to -140, and the under 8.5 runs (+109).
- Starters: Merrill Kelly (6-8, 5.71 ERA) vs. Griffin Canning (1-6, 6.71 ERA); first pitch 9:40 p.m. ET.
- Kelly has a 51.3% hard-hit rate and 11.54 xERA over his last two outings; Canning has a 3.24 FIP in that span.
- San Diego scored 10 runs Wednesday; Arizona's offense has a 72 wRC+ over its previous six contests.
- Watch on DBacks.TV and Padres.TV; Yahoo Sports lists a 6:40 p.m. PST start at Petco Park.
What happened in the Diamondbacks-Padres series?
Arizona opened the series with an 8-0 shutout win on Monday, per Arizona Sports, but cooled off with a 4-1 loss Tuesday. Both clubs entered Wednesday's ESPN matchup at 45-46 and 4.5 games out of the final National League Wild Card spot.
Covers.com notes the Padres answered with 10 runs in Wednesday's game, building momentum into Thursday's series finale. That offensive surge matters because Arizona's bats have struggled lately, posting just a 72 wRC+ across their previous six games.
Who will win Diamondbacks vs Padres tonight?
Covers.com targets San Diego to jump on Merrill Kelly, making the Padres moneyline the primary pick at -121. Kelly has allowed hard contact at a 51.3% rate over his last two starts, with an 11.54 xERA and 3.27 HR/9 during that stretch.
Griffin Canning has been shaky overall (6.71 ERA), but Covers highlights a 3.24 FIP over his last two appearances with zero home runs allowed. The analysis expects Canning to keep finding form against Arizona while the Padres punish Kelly. The pick is playable up to -140.
Market odds listed by Covers show Arizona at +113 and San Diego at -117 on the moneyline, with the Padres -1.5 (+170) on the run line.
Should you bet the over or under 8.5 runs?
Despite both starters carrying elevated ERAs, Covers.com recommends the under 8.5 at +109, playable up to -130. The logic: Canning should limit a Diamondbacks lineup that has not been thriving offensively, even with Kelly vulnerable on the other side.
Covers lists the total at 8.5 with the over at -117 and the under at +113. After Wednesday's high-scoring affair, the under play banks on Arizona's cold bats more than another slugfest.
How can you watch the Diamondbacks vs Padres game?
Thursday's finale airs on DBacks.TV and Padres.TV, with first pitch at 9:40 p.m. ET at Petco Park in San Diego, per Covers.com. Yahoo Sports lists a 6:40 p.m. PST start and Padres.TV as the viewing option, with 97.3 The Fan carrying the radio broadcast.
Arizona Sports noted Wednesday's game aired exclusively on ESPN with radio on Arizona Sports 98.7, but Thursday's matchup shifts to the teams' local streaming platforms for out-of-market viewers.