PITTSBURGH — Wandy Rodriguez keeps coming up a pitch or two short when it comes to impressing his new teammates.

Making his home debut with the Pittsburgh Pirates, Rodriguez allowed a pair of two-run homers in a 6-3 loss to the Arizona Diamondbacks on Thursday.

“I don’t know what’s going on with me — I’ve lost the last two games on only one pitch,” Rodriguez said. “Today in that last inning on (Wil) Nieves, I hung a breaking ball, and he hit a home run.”

Jason Kubel homered off Rodriguez in the first inning and again off Jared Hughes in the seventh for the Diamondbacks, who completed a 6-4 road trip. Nieves’ drive came in the sixth, and Rodriguez did not allow any other extra-base hits or runs in between.

“Bookend two-run homers, the story of the game for him,” Pittsburgh manager Clint Hurdle said.

Rodriguez (7-11) allowed four runs and seven hits in six innings. He is winless in three starts since the Pirates acquired him from the Houston Astros for three prospects on July 24.

In his previous start, a two-run homer by opposing pitcher Mat Latos did in Rodriguez during a 3-0 loss to Cincinnati.

“It’s only one pitch or two pitches that got me all game,” Rodriguez said. “They hit the ball very well, get a home run, and I lose the game.”

After a three-run second that featured three singles and a sacrifice fly, the first two Pirates batters singled off Saunders in the third. He allowed only one more baserunner.

Gaby Sanchez had three hits for the Pirates and Pittsburgh’s runs came on RBI singles by Michael McKenry and Starling Marte, and a sacrifice fly by Jordy Mercer.