The Arizona Diamondbacks (35-25) open a 6-game road trip Tuesday with the first of 3 games against the Washington Nationals (25-34). First pitch from Nationals Park is at 7:05 p.m. ET.

Season series: Diamondbacks lead 2-1

The Diamondbacks lost the final 2 games of a homestand over the weekend to the Atlanta Braves after winning 6 straight games from May 28-June 2. Arizona is 10-5 in its last 15 games and is tied with the Los Angeles Dodgers for 1st place in the NL West.

The Nationals also lost the final 2 games of a series over the weekend falling 4-2 Saturday and 11-3 Sunday to the Philadelphia Phillies after winning the opener Friday. Washington is 2-5 in its last 7 games and 7-11 in its last 18.

Diamondbacks at Nationals projected starters

LHP Tommy Henry vs. RHP Jake Irvin

Henry (3-1 3.73 ERA) makes his 8th start and 9th appearance. He has a 1.24 WHIP 3.5 BB/9 and 5.5 K/9 through 41 IP.

• Last start: Win 7 IP 0 R 2 H 2 BB 7 K in a 6-0 win over the Colorado Rockies Wednesday
• Has 3 quality starts in his last 5 outings

Irvin (1-3 5.67 ERA) makes his 7th start. He has a 1.63 WHIP 5.7 BB/9 and 7.3 K/9 through 27 IP.

• Last start: Loss 5 IP 4 ER 8 H 1 BB 3 K in a 9-3 loss at the Los Angeles Dodgers last Tuesday
• Has an 8.82 ERA across 16 1/3 IP across his last 4 starts

Diamondbacks at Nationals odds

• Moneyline (ML): Diamondbacks -155 (bet $155 to win $100) | Nationals +125 (bet $100 to win $125)
• Run line (RL)/Against the spread (ATS): Diamondbacks -1.5 (+100) | Nationals +1.5 (-120)
• Over/Under (O/U): 10 (O: -105 | U: -115)

Diamondbacks at Nationals picks and predictions

Prediction

Diamondbacks 7 Nationals 4

Moneyline

The Diamondbacks are 7-3 in their last 10 road games. Arizona is 5-2 in Henry’s starts this season.

The Nationals have dropped 4 of their last 6 at home and have lost Irvin’s last 4 starts.

The Diamondbacks have won 6 of their last 8 meeting against the Nationals. The moneyline isn’t a bad bet but you have a better payout on the run line with trends that point toward the Diamondbacks covering.

PASS.

Run line/Against the spread

Seven of the Diamoncbacks’ last 9 wins have been by 2 or more runs. They are 35-25 ATS on the season and 10-5 ATS in their last 15 games.

The Nationals are 36-23 ATS overall but only 15-16 ATS at home.

Eight of their last 9 losses have been by more than 1 run.

BET DIAMONDBACKS -1.5 (+100).

Over/Under

Three of Henry’s last 4 starts have not reached 10 total runs.

Irvin’s last 4 outings have all had 10 or more total runs.

Four of the Nationals’ last 5 games have had more than 10 runs.

BET OVER 10 (-105).