Giants vs Diamondbacks Odds: Moneyline, Over/Under, Props - May 20, 2026

Giants at Diamondbacks

7:40 pm • ARID

San Francisco Giants

0-0

3 - 6

Arizona Diamondbacks

0-0

pitcher		team	era	w-l
M.Kelly			4.94	10-14
T.Mahle			5.13	3-9

MatchupOpenSpreadTotalMoneyline
Giants 0-0	+1.5	-1.5+147	o8.5-113	-108
Diamondbacks 0-0	u8.5	-2.5-357	u8.5-108	-111

Wednesday 7:40 p.m.

May 20, 2026

Chase FieldPhoenix

Under 9-115

0.58u

Bet to -122

Over 9-102

0.51u

UPDATE: After lineups vomited out, I don't like this much at 9 anymore, but would still consider 8.5. (DK) Roof closed 108 Park Factor - Pitchers have combined for 33 barrels in fewer than 80 innings. Kelly 2 R/16 IP L2 starts - but only 9 Ks & 7 Barrels. SFG 4th worst pen estimators L30 days

K.Marte o1.5 Total Bases+105

$1.05

Over 8.5-115

Under 9-117

1.17u

SF +104

ARI -130

Over 8.5-113

SF -104

1.25u

Giants vs Diamondbacks: PRO's Top Prop Edge
Action Network Staff•
May 20, 2026 UTC

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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 40-41 in their road games against the spread
The totals have gone OVER in 4 of Diamondbacks' last 5 games
The totals have gone OVER in 36 of Diamondbacks' 81 last games at home

Against the Spread (ATS) History

	overall	home	away	favorite	underdog
Diamondbacks	84-78	44-37	40-41	34-41	48-37
Giants	80-82	41-40	39-42	21-27	58-54

Over/Under History

	overall	home o/u	away o/u	favorite o/u	underdog o/u
Diamondbacks	71-87-4	36-43-2	35-44-2	33-40-2	36-47-2
Giants	75-77-10	36-42-3	39-35-7	27-18-3	47-58-7

Straight-Up (ML) History

	overall	home	away	favorite	underdog
Diamondbacks	86-76	45-36	41-40	43-32	41-44
Giants	65-97	37-44	28-53	24-24	40-72

date	opponent	score	spread	over/under	moneyline
May 20th	SF	W 5-3	-1.5 W	U 8.5	ARI -125
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

Blake Walston
SP
Walston is out with elbow
Out

Cristian Mena
SP
Mena is doubtful with shoulder
Doubtful

Hayden Birdsong
SP
Birdsong is out with arm
Out

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PITCHER	PC	IP	K	ER
RT.Mahle, P	79	5	6	6
RK.Winn, P	11	1	3	0
LS.Hentges, P	16	1.1	0	0
RJ.Peguero, P	12	0.2	1	0

HITTERS	H-AB	R	HR	RBI
1W.Brennan, RF	0-3	0	0	0
1J.Rodriguez, PH	0-0	0	0	0
1J.Rodriguez, RF	0-0	0	0	0
2L.Arraez, 2B	1-4	0	0	0
3C.Schmitt, LF	1-4	1	1	1
4R.Devers, 1B	1-4	0	0	0
5W.Adames, SS	0-4	0	0	0
6M.Chapman, 3B	2-4	2	0	0
7B.Eldridge, DH	1-4	0	0	1
8D.Susac, C	1-4	0	0	0
9D.Gilbert, CF	1-2	0	0	1
9H.Bader, PH	0-2	0	0	0
9H.Bader, CF	0-2	0	0	0

PITCHER	PC	IP	K	ER
RM.Kelly, P	85	6	4	3
LB.Garcia, P	9	0.2	0	0
RT.Clarke, P	6	0.1	0	0
RB.Pfaadt, P	9	1	0	0
RP.Sewald, P	13	1	1	0

HITTERS	H-AB	R	HR	RBI
1K.Marte, 2B	3-3	3	1	2
2I.Vargas, 1B	0-4	0	0	1
3G.Perdomo, SS	1-3	0	0	3
4A.Del Castillo, C	0-4	0	0	0
5L.Gurriel, DH	0-4	0	0	0
6J.Fernandez, 3B	2-4	0	0	0
7J.Barrosa, RF	0-3	0	0	0
8T.Tawa, LF	1-3	1	0	0
9R.Waldschmidt, CF	2-3	2	0	0