It’s Monday, August 18 and the Guardians (63-60) are in Phoenix to take on the Diamondbacks (60-65). Gavin Williams is slated to take the mound for Cleveland against Zac Gallen for Arizona.
Both the Guardians and Diamondbacks are coming off being swept in three-game series. Cleveland was swept by Atlanta whereas Arizona was downed by Colorado. This three-game series is the only meeting of the season between Cleveland and Arizona.
Let’s dive into the matchup and find a sweat or two. We’ve got all the info and analysis you need to know ahead of the game, including the latest info on how to catch first pitch, odds, recent team performance, player stats, and of course, our predictions, picks & best bets for the game from our modeling tools and staff of experts.
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Game details & how to watch Guardians at Diamondbacks
- Date: Monday, August 18, 2025
- Time: 9:40PM EST
- Site: Chase Field
- City: Phoenix, AZ
- Network/Streaming: CLEG, ARID
Never miss a second of the action and stay up-to-date with all the latest team stats and player news. Check out our day-by-day MLB schedule page, along with detailed matchup pages that update live in-game with every out.
Odds for the Guardians at the Diamondbacks
The latest odds as of Monday:
- Moneyline: Guardians (-102), Diamondbacks (-116)
- Spread: Diamondbacks 1.5
- Total: 9.0 runs
Probable starting pitchers for Guardians at Diamondbacks
- Pitching matchup for August 18, 2025: Gavin Williams vs. Zac Gallen
- Guardians: Gavin Williams, (7-4, 3.38 ERA)
Last outing: 12.00 ERA, 4 Earned Runs Allowed, 5 Hits Allowed, 1 Walks, and 4 Strikeouts - Diamondbacks: Zac Gallen, (9-12, 5.31 ERA)
Last outing: 5.40 ERA, 3 Earned Runs Allowed, 5 Hits Allowed, 2 Walks, and 1 Strikeouts
- Guardians: Gavin Williams, (7-4, 3.38 ERA)
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Expert picks & predictions for tonight’s game between the Guardians and the Diamondbacks
Rotoworld Best Bet
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Our model calculates projections around each moneyline, spread and over/under bet for every game on the MLB calendar based on data points like past performance, player matchups, ballpark information and weather forecasts.
Once the model is finished running, we put its projection next to the latest betting lines for the game to arrive at a relative confidence level for each wager.
Here are the best bets our model is projecting for Monday’s game between the Guardians and the Diamondbacks:
- Moneyline: NBC Sports Bet is recommending a play on the Arizona Diamondbacks on the Moneyline.
- Spread: NBC Sports Bet is leaning towards a play ATS on the Cleveland Guardians at +1.5.
- Total: NBC Sports Bet is leaning towards a play on the under on the Game Total of 9.0.
Want even more MLB best bets and predictions from our expert staff & tools? Check out the Expert MLB Predictions page from NBC.
Top betting trends & insights to know ahead of Guardians at Diamondbacks
- Cleveland is 0-3 in the last 3 games and 2-4 in the past 6
- Arizona is 0-3 in the last 3 games and 3-3 in the past 6
- The Diamondbacks have won 3 straight matchups against the Guardians with Zac Gallen opening
- This season the Diamondbacks pitcher Zac Gallen has an ERA of 5.31
- With Zac Gallen as the starter the Diamondbacks have covered in 3 straight games
If you’re looking for more key trends and stats around the spread, moneyline and total for every single game on the schedule today, check out our MLB Top Trends tool on NBC Sports!
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- Jay Croucher (@croucherJD)
- Drew Dinsick (@whale_capper)
- Vaughn Dalzell (@VmoneySports)
- Trysta Krick (@Trysta_Krick)
