MLB · Wed, Jul 1 · 9:40 PM

Giants at Diamondbacks

O/U 9.5 · RL Diamondbacks -1.5 · Chase Field

GARY'S PICK

MLBvs Giants· -130

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.

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.

The pick & result

Published pick: Diamondbacks ML -130
Published odds: -130
Result: Lost
Final score: 6-4

Odds are the American price printed with this pick, not a current offer. Wins, losses and pushes remain on the public record; a missing grade is not a win.

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.

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)

The research

The dated measurements the app shows under this card — observations with their sample and source, not predictions.

STARTER FORM

Zac Gallen: 9.18 ERA over his last 3 starts
9.18
Across his last 3 starts (16.7 IP) he has been tagged for 17 earned runs — a 9.18 ERA with a 1.68 WHIP (1.58 season) against a 6.15 season mark.
Trevor McDonald: 7.50 ERA over his last 3 starts
7.50
He is carrying a 7.50 ERA over his last 12 innings with a 1.92 WHIP (1.35 season) — the 4.94 season line is doing a lot of work for him right now.

HEAT CHECK

Ketel Marte: 1.133 OPS in Last 15 Days
1.133
That 1.133 OPS spans the last 15 days (50 PA) against a .806 season baseline, a 0.327 swing. He has 17 home runs on the season. His total-bases line tonight: 1.5.
Rafael Devers: 1.105 OPS in Last 15 Days
1.105
The last 15 days sample runs 46 PA: a 1.105 OPS versus .762 for the season, 0.343 above his norm. He has 15 home runs on the season. His total-bases line tonight: 1.5.

HR THREAT

Ketel Marte
+400
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.
Rafael Devers
+350
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.

FIRST INNING

SF have gone quiet in the 1st: runs in 1 of their last 10
1/10
San Francisco Giants have scored in the first inning just 1 time in their last 10 games — slow-starting lineup, and the 1st has been a free pass for opposing starters.

HEAD-TO-HEAD

Diamondbacks are 9-1 vs Giants this season
9-1
Diamondbacks lead the season series 9-1 over Giants. ARI won the last meeting 8-2.

TEAM RECORD

Giants 2-6 in Trevor McDonald's last 8 starts
2-6
Giants are 2-6 in Trevor McDonald's last 8 starts this season — losers of his last 3 in a row. He starts tonight.

FANTASY PICKUPS

Bryce Eldridge
.841 OPS
Pickup vs Zac Gallen (6.16 xERA) — .841 OPS, bats 3rd.
Casey Schmitt
.805 OPS
Pickup vs Zac Gallen (6.16 xERA) — .805 OPS, bats 2nd.
Jung Hoo Lee
.802 OPS
Pickup vs Zac Gallen (6.16 xERA) — .802 OPS, bats 6th.

All research from this day

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: Daily picks first stored July 1, 2026 at 1:05 PM ET.
Odds record: The pick receipt shows the price printed in the published ticket. The matchup market and line ladder provide separate market context. Stored sportsbook sources: fanduel, caesars, draftkings, betmgm, betrivers, fanatics.
Accountability: Read the editorial standards, source policy, and corrections process.

Props on this game

GARY'S PICK
KETEL MARTETOTAL BASES OVER 1.5
MLBDiamondbacks· -105
✓ CASHED · ACTUAL 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 Marte
Total Bases over 1.5
-105 · CASHED · ACTUAL 3
Diamondbacks
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.
THE LONG SHOT
KETEL MARTEHR OVER 0.5
MLBDiamondbacks· +400
LOST · ACTUAL 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.
Ketel Marte
HR over 0.5
+400 · LOST · ACTUAL 0
Diamondbacks
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.
THE LONG SHOT
RAFAEL DEVERSHR OVER 0.5
MLBGiants· +350
LOST · ACTUAL 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.
Rafael Devers
HR over 0.5
+350 · LOST · ACTUAL 0
Giants
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.

Every prop from this day is on the archive page.

Every pick posts before the game and is graded after, in public. My Book on this website lets you tail or fade listed calls and keeps your record separately labeled; Gary is also available as a native iOS app.

Get Gary on the App Store

Every MLB game this day The MLB record Today's MLB picks Every sport this day