MLB : Washington Nationals vs Arizona Diamondbacks Odds & Prediction

Game Info: May 31, 2025 10:10PM EDT @ Chase Field

The Nationals are peaking at just the right time and rolling into Chase Field, full of confidence after a great road performance. Meanwhile, at the same time, home losses have been fairly heavy for the Diamondbacks, and they need to prove they can keep winning at home.

Betting Odds and Info

These are the latest odds as of writing:

Moneyline: Nationals 2.57 , Diamondbacks 1.57

Spread: Nationals +1.5 , Diamondbacks -1.5

Over/Under: 10

Team Recent Performance

Washington Nationals

They won the game on May 30 against the Diamondbacks, 9-7, covering the +1.5 spread, and going over on the total of 9.5. On May 29, they also beat the Mariners, 9-3, covering the -1.5 spread and going over 7.5. On May 28, they blanked Seattle 9-0, covering the +1.5 spread and going over on a total set at 8. Their only recent losses were on May 27, when they lost 1-9 to the Mariners and were unable to cover the +1.5 spread; the total went over 8.5. They also lost 2-3 to the Giants on May 25, covering the +1.5 spread, and the total was under 7.5.

Arizona Diamondbacks

The Nationals beat the Diamondbacks on May 30 by a score of 7-9, which broke their chances of making the -1.5 cover despite the score exceeding 9.5. They suffered a 1-10 defeat at the diabolic hands of the Pittsburgh Pirates on May 28, also failing the -1.5, and jutting over 7.5. The Diamondbacks also lost to the Pirates-9, scoring 6 runs against the Pirates on May 27, falling short of covering the -1.5 spread, as total exceeded over 8.5. On May 26, they won a match scoring 5 runs against Pittsburgh at 0 by the -1.5 cover. Their last game was on May 26 when they lost to the Cardinals 3-4, but won +1.5 since the total counts below 7.5.

Team Head-to-Head Matchup

Offensively, the Arizona Diamondbacks are stronger than the Washington Nationals with 6.20 runs and 11.60 hits per game averaged from the last ten games versus 3.90 runs and 7.70 hits by Washington. Walks are about even with Arizona with 3.00 and Washington with 2.90. With respect to the opposition’s direct offense, the Nationals strike more often than Arizona, averaging about 7.60 strikeouts per game versus Arizona’s 5.80. Both over/under trends indicate both teams registered 6-4, hence the two sides have very similar outcomes for the total.

Team Injuries Update

Washington Nationals

Paul DeJong (IF, nose), Josiah Gray (P, elbow), Andres Chaparro (IF, oblique), Cade Cavalli (P, elbow), and DJ Herz (P, elbow) are out.

Arizona Diamondbacks

Jordan Montgomery (P, elbow) is out for the season.

SPORTBOOK.AG’s Prediction

The Washington Nationals will win and cover the spread with the total going over 10.

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