Jon Niese will start the series finale against the D-backs at Chase Field tonight.
Niese traded to the Pirates this past off season for Neil Walker, then re-acquired from Pittsburgh for LH reliever Antonio Bastardo on Aug. 1.
"When I first read about it, I was kind of shocked," Niese said about returning to the Mets, according to ESPN.com's Adam Rubin. "At the same time, I know here. I know New York. I'm comfortable. I've had success here. So I can see where they're coming from, too."
In 18 starts for the Pirates earlier this season, Niese was 7-6 with a 5.