Giants vs. Diamondbacks Odds & Betting Predictions - May 20, 2026

Giants at Diamondbacks

1:40 am • ARID

San Francisco Giants

@

Arizona Diamondbacks

pitcher		team	era	w-l
R.Nelson			5.40	1-3
L.Roupp			3.49	5-4

MatchupOpenSpreadTotalMoneyline
Giants 20-28	+1.5	+1.5-200	o8.5-120	+105
Diamondbacks 23-23	u8.5	-1.5+165	u8.5-101	-125

location pin

Wednesday 1:40 a.m.

May 20, 2026

Chase FieldPhoenix

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85°Fahrenheit

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0%Rain

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6Wind

ARI -125

1.25u

Under 8.5+101

0.5u

Bet to -112

ARI -118

0.59u

Bet to -133

No props found

MLB Public Betting

Diamondbacks are 3-2 in their last 5 games.
Diamondbacks are 3-2 in their last 5 games against the spread
Diamondbacks are 14-10 in their road games against the spread
The totals have gone OVER in 3 of Diamondbacks' last 5 games
The totals have gone OVER in 10 of Diamondbacks' 22 last games at home

Against the Spread (ATS) History

	overall	home	away	favorite	underdog
Diamondbacks	28-18	14-8	14-10	11-7	16-11
Giants	20-28	9-13	11-15	5-10	15-17

Over/Under History

	overall	home o/u	away o/u	favorite o/u	underdog o/u
Diamondbacks	24-20-2	10-11-1	14-9-1	8-9-1	15-11-1
Giants	21-25-2	10-11-1	11-14-1	10-5	10-20-2

Straight-Up (ML) History

	overall	home	away	favorite	underdog
Diamondbacks	23-23	13-9	10-14	11-7	11-16
Giants	20-28	10-12	10-16	7-8	13-19

date	opponent	score	spread	over/under	moneyline
May 19th	SF	W 12-2	-1.5 W	O 9	ARI -136
May 17th	@COL	W 8-6	-1.5 W	O 10.5	ARI -147
May 16th	@COL	L 2-4	-1.5 L	U 11.5	COL -147
May 16th	@COL	W 9-1	-1.5 W	U 12	ARI -121
May 14th	@TEX	L 5-6	-1.5 L	O 8	TEX -113

Corbin Burnes
SP
Burnes is out with elbow
Out
Blake Walston
SP
Walston is out with elbow
Out
Tyler Locklear
1B
Locklear is out with elbow
Out

Cristian Mena
SP
Mena is doubtful with shoulder
Doubtful

Hayden Birdsong
SP
Birdsong is out with arm
Out

See more MLB Injuries

PITCHER		W-L	ERA	WHIP	K/9
RL.Roupp, P		5-4	3.49	1.143	10.65

HITTERS	AVG	OBP	SLG	HR
1J.Lee, RF	.268	.311	.385	3
2L.Arraez, 2B	.324	.365	.432	2
3C.Schmitt, DH	.295	.342	.523	8
4R.Devers, 1B	.240	.288	.377	5
5W.Adames, SS	.238	.273	.376	4
6M.Chapman, 3B	.218	.293	.307	1
7D.Gilbert, LF	.217	.278	.337	2
8D.Susac, C	.387	.424	.516	0
9H.Bader, CF	.171	.200	.382	4

PITCHER		W-L	ERA	WHIP	K/9
RR.Nelson, P		1-3	5.40	1.156	8.60

HITTERS	AVG	OBP	SLG	HR
1K.Marte, 2B	.222	.276	.368	5
2C.Carroll, RF	.284	.392	.555	7
3G.Perdomo, SS	.227	.344	.353	2
4N.Arenado, 3B	.272	.347	.463	7
5I.Vargas, 1B	.335	.356	.544	7
6L.Gurriel, LF	.228	.295	.316	1
7A.Del Castillo, DH	.185	.232	.326	3
8G.Moreno, C	.261	.309	.409	2
9R.Waldschmidt, CF	.313	.371	.438	0

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MatchupOverUnder
Giants 20-28	N/A	N/A
Diamondbacks 23-23	N/A	N/A