The Pirates (73-81) won their third straight game and improved to 15-8 since Aug. 28.
After leaving the bases loaded in the first inning against Pirates opener Andre Jackson, the Reds broke through in the second against reliever Luis L. Ortiz.
The Pirates tied the game against Cincinnati starter Andrew Abbott in the fourth.
The Reds reclaimed the lead in the fifth on a bases-loaded groundout by Joey Votto and an infield RBI single from Marte.
Solo homers from Triolo and Rodriguez off Buck Farmer put the Pirates up 4-3 in the sixth.
Persons:
David Bednar, Noelvi Marte, Ke'Bryan Hayes, Henry Davis, Jared Triolo, Endy Rodriguez, Ian Gibaut, Bryan Reynolds, Miguel Andujar, Andre Jackson, Luis L, Ortiz, Elly De La Cruz, Jonathan India's, Andrew Abbott, Hayes, Will Benson, Davis, Abbott, Joey Votto, Rodriguez, Buck Farmer, TJ Friedl, Hunter Stratton
Organizations:
Pittsburgh Pirates, Cincinnati, Reds, Pirates, Pittsburgh, The Pirates, The Reds, Chicago Cubs, National League, Marte, Triolo, Thomson
Locations:
Stratton