PITTSBURGH — In what might be right-hander Zac Gallen’s final start, he and the Arizona Diamondbacks are trailing the Pittsburgh Pirates and right-hander Paul Skenes, 3-0, after five innings on July 27 at PNC Park.

The Pirates scored a run in the second, capitalizing on the incredible speed of Oneil Cruz, and added two more in the third.

Meanwhile, Skenes has been his usually dominant self, giving up just three hits and a walk through five scoreless innings, striking out eight. He has worked out of jams in three separate innings.

With Cruz on first and nobody out in the second, the Pirates’ Tommy Pham dropped a single into center field. Cruz held up briefly coming around second but turned on the jets after that, never slowing down as he rounded third. He scored easily, seemingly catching the Diamondbacks by surprise with his aggressiveness.

The Pirates got three hits off Gallen to score two more runs in the third.

Alek Thomas reinstated from bereavement list

The Arizona Diamondbacks reinstated outfielder Alek Thomas from the bereavement list ahead of their series finale against the Pittsburgh Pirates.

There was no corresponding move; Thomas takes the spot vacated by outfielder Randal Grichuk, who was traded to the Kansas City Royals during the game on July 26.

Meanwhile, manager Torey Lovullo said left-hander Jalen Beeks (back) will begin a rehab assignment with Triple-A Reno on July 29.

Right-hander Shelby Miller continues to progress from the back discomfort he felt in recent days and is scheduled to throw a live batting practice session on July 28.

Diamondbacks at Pirates, 10:35 a.m., Cox, Ch. 34

Diamondbacks RHP Zac Gallen (7-11, 5.58) vs. Pirates RHP Paul Skenes (5-8, 1.91).

At PNC Park: Gallen’s up-and-down season continued when he gave up six runs in six-plus innings against the Astros at Chase Field. It was a second consecutive rough outing after he had turned in back-to-back impressive starts. … Gallen faced the Pirates — and Skenes — on May 28 and gave up six runs (five earned) in five-plus innings in a 10-1 loss. … He has a strong 42.9 percent whiff rate on his curveball but has allowed a .449 slugging on the pitch. … Skenes, in his second big league season, started the All-Star Game for the second year in a row earlier this month. He dominated the Tigers in his most recent start, firing six scoreless innings in a 3-0 win. … He has allowed more than two earned runs in only three of his 21 starts so far this season and has logged at least five innings 20 times. … He threw 6 2/3 scoreless innings against the Diamondbacks on May 28. … Pitch-tracking data recognizes seven distinct pitches from Skenes: fastball, split, sweeper, change-up, sinker, slider and curveball. He averages 98.2 mph with his fastball.

Coming up

July 28: At Detroit, 3:40 p.m., Diamondbacks LHP Eduardo Rodriguez (3-6, 5.50) vs. Tigers RHP Casey Mize (9-4, 3.40).

July 29: At Detroit, 3:40 p.m., Diamondbacks RHP Brandon Pfaadt (10-6, 4.76) vs. Tigers RHP Troy Melton (0-1, 10.80).

July 30: At Detroit, 10:10 a.m., Diamondbacks RHP Ryne Nelson (6-2, 3.29) vs. Tigers RHP Reese Olson (4-4, 3.15).