PHILADELPHIA — Sean Rodriguez is having his most productive big league season yet, and he had a memorable blast Tuesday night to keep the Pittsburgh Pirates’ slim postseason hopes alive.

Rodriguez had a pinch-hit three-run homer in the ninth inning, lifting the Pittsburgh Pirates over the Philadelphia Phillies 5-3 on Tuesday night.

Pittsburgh remained six games behind the Mets for the second NL wild card.

Rodriguez’s home run was his career-high 13th of the season and first since Aug. 14. It was also his first pinch-hit home run since May 25, 2013.

“A couple years ago, yeah I was driving the ball, but I wasn’t necessarily putting the ball in play enough,” Rodriguez said. “This year, I’ve been able to do that.”

Rodriguez hit for pitcher Felipe Rivero (1-5) with two on and one out and drilled a 2-2 pitch from reliever Jeanmar Gomez (3-4) into the second row of seats in right field.

“It was a tough day for me,” Gomez said. “It was a slider that was up. Some of my pitches were flat.”

Rodriguez put the Pirates ahead after Francisco Cervelli reached on a walk and Jordy Mercer doubled off Gomez.

Tony Watson struck out two in the ninth for his 12th save.

Pirates right-hander Ivan Nova entered 5-0 since being acquired from the New York Yankees on Aug. 1. He allowed two runs and five hits while recording a season-high 11 strikeouts but left the game in the seventh after throwing 92 pitches.

Nova missed the chance to become the second Pirates pitcher to go 6-0 in his first eight starts.

“I was getting ahead in the count and I threw some good sinkers and that was a good thing for me,” Nova said. “They’re an aggressive team and they were out there swinging.”

Pirates manager Clint Hurdle was ejected for the sixth time this season and the 51st time in his managerial career in the sixth inning.