Giants at Diamondbacks
O/U 9.5 · RL Diamondbacks -1.5 · Chase Field
Diamondbacks ML-130
CONF 78%
LLostFinal 6-4
The read
The roof is closed at Chase Field as the Arizona Diamondbacks look to complete a series sweep and secure their ninth consecutive victory of 2026 against the visiting San Francisco Giants.
My money is on the Diamondbacks tonight because the Giants' infield defense is in absolute shambles. San Francisco's star third baseman Matt Chapman is out with a fresh abdominal strain diagnosed today, and shortstop Willy Adames remains highly questionable with back spasms. In their place, the Giants are starting an ill Casey Schmitt and Christian Koss, who has just 13 career games under his belt. This is a catastrophic mismatch for Giants starter Trevor McDonald. McDonald is a ground-ball pitcher with a high 1.63 GO/AO who relies entirely on his infield defense to convert plays into outs. Without his star defenders, McDonald is highly vulnerable, especially playing behind a Giants team that has already committed a whopping 58 errors this season. Additionally, McDonald has massive platoon splits, allowing a .308 AVG and .906 OPS to left-handed hitters. The Diamondbacks are starting five left-handed or switch-hitting bats, including Corbin Carroll, who carries a .989 home OPS and a .398 xwOBA against sliders, McDonald's primary secondary offering.
The strongest argument against Arizona is Zac Gallen's recent form. Gallen is sporting a 6.15 ERA with a matching 6.16 xERA, meaning his poor play is fully earned. He has been rocked for an 8.33 ERA over his last five starts while striking out only 10 batters in 27.0 innings. While the market might be overpaying for McDonald's fragile 4.94 ERA—given his much stronger 4.25 xERA suggests he's been unlucky—Gallen's vulnerability is largely neutralized by the watered-down nature of the Giants' injury-depleted lineup. If this becomes a battle of the bullpens, Arizona has a massive edge with Juan Morillo (2.78 ERA), Brandyn Garcia (2.45 ERA), and Jonathan Loaisiga (2.64 ERA) fully rested, while San Francisco's relief corps is completely decimated. Arizona is 26-17 at home and a perfect 8-0 against the Giants this season; expect that dominance to continue.
Injuries noted
Diamondbacks: [KNOWN] Michael Soroka (SP) — Lower Body (Left): Soroka (glute) is expected to begin throwing bullpen sessions twice weekly starting Tuesday, MLB.com reports. (Jun 27 — 4d ago) [KNOWN] James McCann (C) — Quadriceps (Right): McCann (quadriceps) will start playing games in the Arizona Complex League next week, MLB.com reports. (Jun 27 — 4d ago) [KNOWN] Ryne Nelson (SP) — Elbow (Right): The Diamondbacks transferred Nelson (elbow) to the 60-day injured list Thursday. (Jun 25 — 6d ago) [NEW] Jordan Lawlar (LF) — Hamstring (Right): Manager Torey Lovullo said June 20 that Lawlar will receive further imaging on his strained right hamstring during the All-Star break to gauge his healing, Steve Gilbert MLB.com reports. (Jun 30 — 1d ago) Giants: [NEW] Willy Adames (SS) — Back (Not Specified): Adames (back) is out of the lineup for Tuesday's game against the Diamondbacks. (Jun 30 — 1d ago) [KNOWN] Daniel Susac (C) — Back (Not Specified): The Giants placed Susac on the 10-day injured list Friday with a lower-back strain, Alex Pavlovic of NBC Sports Bay Area reports. (Jun 26 — 5d ago) [NEW] Keaton Winn (RP) — Elbow (Right): Winn (elbow) completed a 25-pitch bullpen Monday, Evan Webeck of the California Post reports. (Jun 29 — 1d ago) [NEW] Harrison Bader (CF) — Foot (Left): Bader (foot) will start his hitting and throwing progressions later this week, Evan Webeck of the California Post reports. (Jun 29 — 1d ago) [NEW] Joel Peguero (RP) — Hamstring (Left): Peguero (hamstring) threw 30 pitches during a bullpen session Monday, Evan Webeck of the California Post reports. (Jun 29 — 1d ago) [KNOWN] Hayden Birdsong (Starting Pitcher) — Elbow (Right): Birdsong underwent successful UCL reconstruction surgery on his right elbow Wednesday, Susan Slusser of the San Francisco Chronicle reports. (May 8 — 54d ago) [KNOWN] Jose Butto (Relief Pitcher) — Arm (Right): The Giants transferred Butto (arm) to the 60-day injured list Tuesday. (May 8 — 54d ago) [NEW] Matt Chapman (3B) — Abdomen (Right): Chapman was diagnosed with an abdominal muscle strain following his removal from Tuesday's game against the Diamondbacks, Susan Slusser of the San Francisco Chronicle reports. (Jul 1 — 0d ago)
About this analysis
- Who made it
- Gary AI, an AI sports-analysis product operated by Gary A.I. LLC. No human reviewer is claimed unless one is explicitly named.
- Published data
- Board stored July 1, 2026 at 1:05 PM ET.
- Odds record
- The displayed line is the value retained with the call. Stored sportsbook sources: fanduel, caesars, draftkings, betmgm, betrivers, fanatics.
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Props on this game
3Ketel MarteOVER 1.5 Total Bases Total Bases-105
WActual 3
Ketel Marte enters tonight as the hottest hitter in the Diamondbacks' lineup, hitting .316 with 5 home runs over his last 10 games. He has cleared the 1.5 Total Bases line in seven of those 10 contests, showcasing both consistent multi-hit ability and elite extra-base power.
The matchup tonight is statistically skewed in Marte's favor; Giants starter Trevor McDonald has struggled significantly against left-handed hitters, allowing a .308 batting average and four home runs this season. As a switch-hitter, Marte will bat from the left side tonight to exploit this split.
Chase Field remains a hitter-friendly environment (1.06 park factor), and with the roof closed, the dry desert air facilitates ball carry. McDonald's ground-ball tendency is his best defense, but Marte's current launch angle and contact quality suggest he is well-positioned to find gaps or clear the fence.
Ketel MarteOVER 0.5 Home Runs Home Runs+400
LActual 0
Ketel Marte is currently on one of the most significant power heaters in the league, having homered in four consecutive games leading into tonight. He draws a premier matchup against Trevor McDonald, a right-hander whose production collapses when facing left-handed hitting.
McDonald allows a massive .906 OPS and all four of his season's home runs have come against the left side (in just 107 ABs). As a switch-hitter, Marte will bat from the left side tonight, positioning himself to exploit McDonald's 40.6% hard-hit rate.
Batting leadoff ensures Marte will see the maximum volume of plate appearances (likely 5), maximizing his opportunities to extend his home run streak against a pitcher who struggles to keep the ball in the yard against lefties.
Rafael DeversOVER 0.5 Home Runs Home Runs+350
LActual 0
Rafael Devers is in peak form, launching four home runs over his last ten games and displaying elite power efficiency. Tonight he faces Zac Gallen, who has struggled significantly this season with a 6.15 ERA that is supported by a nearly identical 6.16 xERA, suggesting his struggles are a result of poor contact management rather than bad luck.
Gallen's 10.1% barrel rate is a major red flag against a power hitter like Devers, especially considering Gallen allows a .889 OPS to left-handed hitters. Devers has seen the ball well at Chase Field this season, posting a 1.072 OPS and 2 home runs in just 18 at-bats.
With Gallen's strikeout rate sitting at a career-low 5.4 K/9, Devers is highly likely to put the ball in play with high exit velocity, making the +350 price on a home run an exceptional value given the matchup.
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