| MATCHUP | San Francisco Giants | Arizona Diamondbacks |
|---|---|---|
| Team Records | 35-49 | 42-42 |
| Spread | -1.5 147 | +1.5 -178 |
| Moneyline | -108 | -111 |
| Total | Over 9 (-120) | Under 9 (100) |
| Where | Chase Field, Phoenix, Arizona | |
| When | Tuesday, June 30, 2026 | |
| Time | 09:40 PM EDT | |
| TV | MLB.TV | |
In this article, we will formulate a Giants vs Diamondbacks Prediction for this MLB matchup on Tuesday, June 30th in the second game of this series. Let’s take a look at the prediction for this MLB matchup.
Arizona Diamondbacks Preview
The Arizona Diamondbacks have a 42‑42 record this season and are sitting in the 3rd place of the NL West. They have a 25‑17 home record and are coming off a 5‑4 home win against the Giants. They will face the Brewers and the Padres next.
The Diamondbacks have a .238 batting average this season, .308 OBP and .386 Slugging percentage. Arizona’s pitching staff has a 4.33 ERA and 1.30 WHIP. Corbin Carroll is the team’s best hitter with a .276 batting average. Ketel Marte leads the team in RBI with 50, adding a team‑high 16 home runs.
Brandon Pfaadt (R) is the projected starting pitcher for the Diamondbacks, and he has a 0‑1 record, 5.92 ERA and 1.50 WHIP.
San Francisco Giants Preview
The San Francisco Giants have a 35‑49 record this season and are sitting in the 4th place of the NL West. They have a 17‑27 road record and are coming off a 4‑5 road defeat against the Diamondbacks. They will face the Rockies and the Blue Jays next.
The Giants have a .256 batting average this season, .308 OBP and .417 Slugging percentage. San Francisco’s pitching staff has a 4.32 ERA and 1.36 WHIP. Luis Arraez is the team’s best hitter with a .326 batting average. Rafael Devers leads the team in RBI with 43, while Casey Schmitt adds a team‑high 16 home runs.
Landen Roupp (R) is the projected starting pitcher for the Giants, and he has a 5‑7 record, 4.07 ERA and 1.29 WHIP.
San Francisco Giants @ Arizona Diamondbacks Betting Trends: June 30, 2026
- Probable Starting Pitcher: TBD
Why the Arizona Diamondbacks will win
- The Giants have lost each of their last eight night games against NL West opponents.
- The Diamondbacks have won each of their last seven games against the Giants.
- The Giants have failed to cover the run line in seven of their last eight night games against NL West opponents.
- The Diamondbacks have covered the run line in four of their last five games against National League opponents.
- The Diamondbacks have led after 3 innings in each of their last four games as home favorites against NL West opponents.
- The Giants have trailed after 5 innings in each of their last four road games.
- The Giants have lost the first inning in four of their last five games as road underdogs.
- Probable Starting Pitcher: Landen Roupp Record this season: 5-7 ERA: 4.07
- Road Record: 3-3
- Last 5 against Diamondbacks: 0-1
Why the San Francisco Giants will win
- The Diamondbacks have lost each of their last four night games against National League opponents following a home win.
- The Giants have won each of their last three night games following a road loss.
- The Giants have covered the run line in nine of their last 10 games as road underdogs.
- The Diamondbacks have failed to cover the run line in each of their last four games.
- The Diamondbacks have trailed after 3 innings in eight of their last 10 night games against opponents that held a losing record.
- The Diamondbacks have trailed after 5 innings in five of their last six games against NL West opponents.
Total Runs Facts
- Five of the Diamondbacks’ last six games as favorites against National League opponents have gone UNDER the total runs line.
- Four of the Giants’ last five games against National League opponents have gone UNDER the total runs line.
- There has been at least one run scored in the first inning in each of the Giants’ last 11 Tuesday games against NL West opponents.
- There has been at least one run scored in the first inning in each of the last seven night games between the Giants and Diamondbacks.
Arizona Diamondbacks Player Prop Facts
- Ketel Marte has recorded at least one hit in each of his last 12 appearances against NL West opponents that held a losing record.
- Ketel Marte has hit a home run in four of the Diamondbacks’ last five games.
San Francisco Giants Player Prop Facts
- Willy Adames has hit a home run in two of his last three road appearances against the Diamondbacks.
- Landen Roupp has recorded seven strikeouts in four of his last five appearances against NL West opponents.
- Luis Arraez has recorded at least one hit in 17 of his last 18 appearances after playing the previous day.
Matchup/League Facts
- The Diamondbacks rank 1st in the league for triples this season (20).
- The Diamondbacks rank 30th in the league for strikeouts this season (571).
- The Giants rank 1st in the league for doubles this season (162).
- The Giants rank 30th in the league for steals this season (27).
Giants vs Diamondbacks Prediction
The Diamondbacks are 9-1 in their last 10 meetings against the Giants and have won their last four meetings in Arizona.
In this Giants vs Diamondbacks Prediction, both teams are coming at a pickem price. I don’t like either pitcher in this matchup, as they have a combined 9.99 ERA and Brandon Pfaadt has been used as a reliever for the Dbacks but still sits on a terrible 6.08 home ERA. Roupp has given up 8 runs across his last three starts for the Giants and both bullpens have been shaky at best. Take the over 9 in this one.