Guardians vs Diamondbacks Prediction, Pick, Odds for Monday, August 18

Guardians vs Diamondbacks Prediction, Pick, Odds for Monday, August 18 article feature image
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Pictured: Gavin Williams. (Credit: Brad Penner-Imagn Images)

The Arizona Diamondbacks (60-65) and Cleveland Guardians (63-60) will face off in the MLB today. First pitch from Chase Field is scheduled for 9:40 p.m. ET. The game will broadcast live on CLEG.

Arizona is a -126 favorite to win outright on the moneyline, while Cleveland is +104 to pull off the upset. The over/under is set at 9 total runs.

Continue below for my Guardians vs Diamondbacks predictions and MLB picks for Sunday, August 10, as well as probable pitchers, betting trends, injury reports and more.

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Our Guardians vs Diamondbacks Prediction

  • Guardians vs Diamondbacks pick: Over 9 Runs (-110)

Our Guardians vs Diamondbacks best bet is on the over, with the best price currently available at BetMGM. But as always, make sure to find the best odds by checking our live MLB odds page.


Guardians vs Diamondbacks Odds

Guardians Logo
Monday, Aug 18
9:40 p.m. ET
CLEG
Diamondbacks Logo
Guardians Odds
SpreadTotalMoneyline
+1.5
-194
9
-105o / -115u
+104
Diamondbacks Odds
SpreadTotalMoneyline
-1.5
+158
9
-105o / -115u
-126
Odds via DraftKings. Get up-to-the-minute MLB odds here.
DraftKings Logo

Guardians vs Diamondbacks Projected Starting Pitchers

RHP Gavin Williams (CLE)StatRHP Zac Gallen (ARI)
7-4W-L9-12
0.9fWAR (FanGraphs)0.4
3.38/4.23ERA /xERA5.31/4.87
4.58/4.20FIP / xFIP4.63/4.17
1.31WHIP1.35
11.1%K-BB%12.7%
44.3%GB%42.1%
103Stuff+91
93Location+104

Guardians vs Diamondbacks Preview, Picks

The Arizona Diamondbacks open a three-game set against the Cleveland Guardians on Monday night.

Cleveland limps in after being swept by Atlanta (2-0, 10-1, 5-4), while Arizona dropped three of four to Colorado in a high-scoring series (including results of 10-7 and 6-5). The pitching matchup features Gavin Williams for the Guardians against Zac Gallen for the D-backs.

While Gallen has ace-level potential and Williams flashes strikeout stuff, the betting value leans toward the Over 9 runs. Chase Field in late August is a classic high-variance environment, and this spot triggers Evan Abrams’ “Late Season Overs, Lower Totals” system.

Games played in Arizona, Colorado, and Washington often see totals underestimated when set at 10.5 or lower. Dry desert conditions, bullpen fatigue, and expanded rosters all combine to create run-scoring volatility that books don’t fully price in.

With both clubs coming off series full of runs, and Arizona’s recent bullpen struggles exposed by Colorado, conditions line up for another higher-scoring affair in the desert.

MLB Icon
Evan Abrams – Late Season Overs, Lower Totals — COL, ARI, WAS Home (YEAR)
the game was played during the 2025 or 2024 or 2023 or 2022 or 2021 or 2018 or 2017 or 2016 or 2015 or 2014 season
the game was played in September or August or October
the closing total is between 0 and 10.5
betting on the Over
the game is played during the Regular season
the home team is Washington Nationals or Arizona Diamondbacks or Colorado Rockies
$5693
WON
334-255-27
RECORD
57%
WIN%

Guardians vs Diamondbacks Best Bet

  • Over 9 (-110, Fanatics)

Guardians vs Diamondbacks Betting Trends



Guardians vs Diamondbacks Weather


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