The Arizona Diamondbacks host the San Francisco Giants on Tuesday, May 19. First pitch from Chase Field is scheduled for 9:40 p.m. ET. The game will be broadcast on ARID and MLB.TV.
The Giants are favored by -121 on the moneyline and by -1.5 on the run line. The Diamondbacks are +100 on the moneyline and +1.5 on the run line. The total is set at 8.5 runs.
Find my MLB picks and Giants vs Diamondbacks prediction below, as well as probable pitchers, weather report, and more.
Giants vs Diamondbacks Prediction
- Giants vs Diamondbacks Pick: Diamondbacks ML -120 · Under 8.5
My Giants vs Diamondbacks best bet is on Arizona to win the game outright and both teams to go under the total. Make sure to find the best odds by checking our live MLB odds page.
Giants vs Diamondbacks Odds
| Giants Odds | ||
|---|---|---|
| Run Line | Total | Moneyline |
-1.5 +164 | 8.5 -110o / -110u | +100 |
| Diamondbacks Odds | ||
|---|---|---|
| Run Line | Total | Moneyline |
+1.5 -200 | 8.5 -110o / -110u | -118 |
- Giants vs Diamondbacks Moneyline: Giants +100, Diamondbacks -118
- Giants vs Diamondbacks Over/Under: 8.5 (-110o / -110u)
- Giants vs Diamondbacks Run Line: Giants -1.5 (+164), Diamondbacks +1.5 (-200)
Giants vs Diamondbacks MLB Betting Preview
I'm taking two bets in this game:
- Diamondbacks ML -120 (Action PRO projects Arizona -148)
- Under 8.5 (Action PRO project 7.93)
Ryne Nelson is the main reason I’m leaning toward Arizona here.
He looked like he was breaking out last year, but his results this season haven’t matched the peripherals. His xERA sits nearly a run lower than his ERA, which means he's a regression candidate.
The damage has been driven by homers — he has a career‑worst HR/FB Rate — and his groundball rate has cratered to about 25% compared to roughly 40% for his career.
However, his strikeout rate is up and his walk rate is down, so the peripherals suggest better outcomes are coming. I’m banking on that regression showing up today.
On the other side, Landen Roupp looks like he's taking a real step forward for the Giants. He has posted a sizable strikeout bump and is inducing grounders on over half of balls in play, which makes him plenty playable.
Giants vs Diamondbacks Pick, Betting Analysis
Bullpens swing this one further in Arizona’s favor, but they're both in a good spot. The D‑backs’ relief corps has been surprisingly effective, and San Francisco saved several key arms in yesterday’s blowout. That could matter late.
Combine two starters who profile as somewhat sneaky with rested, capable bullpens, and the under becomes attractive as an extra pick with Arizona ML.
If positive regression comes for Nelson in this game, we should be in a good spot when all is said and done.
Pick: Diamondbacks ML -120 · Under 8.5
