The Arizona Diamondbacks close out a three-game set in Washington on Sunday afternoon, and the finale grades close to a coin flip on paper. Arizona arrives as a narrow favorite at -119 on the moneyline, riding a 7-3 stretch over its last 10 games. Washington counters at home, where the Nationals have quietly struggled all season. Both clubs hand the ball to a question mark on the mound, and that is exactly where the betting value hides. Our lean sides with the surging visitors, and the market movement backs that read.
Last Updated: Sunday, July 26, 2026
Arizona Diamondbacks vs. Washington Nationals — Time & How to Watch
| Where | Nationals Park, Washington, D.C. |
| When | Sunday, July 26, 2026 — 1:35 PM ET |
| TV | Nationals.TV / DBacks.TV (MLB.TV) |
Arizona Diamondbacks vs. Washington Nationals Betting Preview
Pitching heads the marquee, and both starters carry real uncertainty. Arizona turns to left-hander Kohl Drake, who makes just his second big-league start. Drake debuted on July 21 against the Athletics and impressed with five innings, one earned run and five strikeouts. Still, his Triple-A results this year were rocky, so one clean outing is a thin sample. Washington answers with veteran right-hander Miles Mikolas, and his season has been a grind. Mikolas owns a 5.60 ERA and a 1.34 WHIP across 21 appearances, and he has bounced between the rotation and the bullpen.
Mikolas has not worked deep in weeks, either. He gave up three earned runs in 3.2 innings at Colorado on July 21. Before that, he surrendered seven earned runs in six innings against Houston. That is a starter the market can attack, and Arizona’s bats have been the hotter group lately.
The two teams enter from different directions. Arizona is 55-50 and has won seven of its last 10, climbing back into the National League wild-card picture. The Diamondbacks average 4.50 runs per game, and the lineup has carried them through this run. Washington sits 53-52 and remains a fringe contender in the NL East. The Nationals actually score more freely at 5.47 runs per game. However, their home record is a poor 21-32. The series is even at a game apiece. Arizona took the opener 3-2 before Washington answered 5-3 on Saturday.
Arizona Diamondbacks vs. Washington Nationals Odds
| Run Line | Moneyline | Total | |
|---|---|---|---|
| Diamondbacks | -1.5 (+130) | -119 | U 10 (+100) |
| Nationals | +1.5 (-150) | -101 | O 10 (-120) |
Odds accurate as of Sunday, July 26, 2026 via TheSpread.com. Odds change, get the latest MLB Odds – Futures – Props
Arizona Diamondbacks vs. Washington Nationals — Who Is the Public Betting?
| Diamondbacks | 42% | 58% | Nationals |
See the latest MLB Public Betting Splits and make smarter wagers!
Diamondbacks vs. Nationals Prediction — Can Arizona Take The Series Today?
The most telling signal here is where the money has gone. Public bettors have leaned to Washington on the run line, with 58% of run-line tickets sitting on the Nationals. Yet the number has drifted the other way. Arizona’s run-line price shortened from +140 at the open to +130. That is a quiet sign that sharper money likes the Diamondbacks to win comfortably rather than merely squeak by. When the crowd sits on one side and the line moves toward the other, that reverse move is the strongest market tell in baseball.
The baseball case lines up with the money. Arizona is the road team, and that matters for a two-run margin. Road clubs bat in the ninth even with a lead, which gives them extra swings to extend the score. The Diamondbacks are also swinging a hot bat, and they draw a starter who has been getting hit hard. If Arizona jumps on Mikolas early, a multi-run cushion is well within reach.
The other side is very much live. Drake is a rookie making his second start, and asking any team to win by two behind an unproven arm carries risk. Washington’s lineup scores plenty at home, and a single Drake mistake could keep this tight. The run line also demands a two-run margin, so a one-run Arizona win still loses the bet. The upside is the plus-money price, which pays out at +130 and only needs to land a little better than four times in 10.
The Pick: Diamondbacks Run Line -1.5 (+130)
Diamondbacks vs. Nationals Prediction — Do Two Struggling Starters Help it go Over?
Start with the arms, because both are shaky. Drake is a rookie with a single MLB start to his name, and Mikolas carries an ERA north of 5.50 while rarely finishing six innings. Two vulnerable starters against two lineups that can score point toward a busy afternoon. Washington puts up 5.47 runs per game, and Arizona’s offense has heated up during its recent surge. The market has nudged the same way. The total opened at 10 with even juice, and the over now costs -120, a small sign of money on scoring.
The caution is the number itself. A total of 10 is already high, so the over needs 11 combined runs to cash. If either starter settles in, or the bullpens quiet things down after the fifth, the under comes into play in a hurry. This is a lean rather than a conviction play. Still, the two-starter picture and the line move tilt it just past even.
The Pick: Over 10 (-120)
Final Thoughts and Bonus Angle
This finale comes down to two unsettled rotations and a market that quietly favors the visitors. Watch the first three innings closely. If Drake escapes early trouble the way he did in his debut, Arizona’s edge grows. If Mikolas coughs up runs the way he has lately, both of our leans move in the right direction. Late-inning bullpen work will decide whether the over gets there, so the middle relievers are the real swing factor once the starters exit.
For more of our recent MLB picks, see our Dodgers vs. Mets prediction and Braves vs. Orioles prediction for two more matchups broken down the same way.
Here is a recap of our two plays for Sunday. The Diamondbacks run line -1.5 (+130) is the top lean, and the over 10 (-120) is the secondary angle. Both rest on the same core read: a hot Arizona club and two starters who could struggle to keep the scoreboard quiet.
MLB Diamondbacks vs. Nationals FAQ: Sunday July 26, 2026
What time does the Diamondbacks vs. Nationals game start?
First pitch is set for 1:35 PM ET on Sunday, July 26, 2026, at Nationals Park in Washington, D.C. It is the Sunday afternoon finale of a three-game weekend series between Arizona and Washington, and it closes out the D-backs’ visit to the nation’s capital.
What channel is the Diamondbacks vs. Nationals game on?
The game airs on the teams’ local networks, Nationals.TV in the Washington market and DBacks.TV in the Arizona market, with a national out-of-market stream available through MLB.TV. Blackout rules apply by region, so local viewers should confirm their market’s coverage before first pitch.
Who is pitching in the Diamondbacks vs. Nationals game?
Arizona starts left-hander Kohl Drake, who makes his second career big-league start after debuting on July 21. Washington counters with veteran right-hander Miles Mikolas, who carries a 5.60 ERA across 21 appearances this season. Both starters bring real uncertainty into the finale.
Where are the Diamondbacks and Nationals playing today?
The game is at Nationals Park in Washington, D.C., the home ballpark of the Washington Nationals. Arizona is the visiting team for this Sunday matinee, wrapping up a three-game road series in the District before the Diamondbacks continue their travel schedule.
Who won the last meeting between the Diamondbacks and Nationals?
Washington won the most recent meeting, beating Arizona 5-3 on Saturday, July 25, 2026, to even the series at one game each. Arizona had taken the opener 3-2 on Friday, so Sunday’s finale serves as the rubber match of the three-game set.