Wandy Rodriguez registered another quality start Tuesday, allowing three runs over six frames in a 5-4 victory.
Travis Snider launched a pinch-hit grand slam in Tuesday's win over the Cubs.
Andrew McCutchen (knee) is back in Tuesday's lineup against the Cubs.
Starling Marte is not in Tuesday's lineup against the Cubs.
Pirates optioned RHP Jered Hughes from Triple-A Indianapolis.
Pirates activated RHP Jose Contreras from the bereavement list.
Andrew McCutchen is day-to-day with right knee soreness.
Jason Grilli earned his 17th save of the season Sunday in the Pirates' 1-0 defeat of the Astros.
Jeff Locke fired seven scoreless innings Sunday in the Pirates' victory over the Astros.
Andrew McCutchen was scratched from the Pirates' lineup due to pain in his right knee.
James McDonald (shoulder) will begin a rehab assignment with Double-A Altoona on May 27.
John McDonald (back) is also dealing with a right elbow injury.
A.J. Burnett allowed one run over seven innings but took a no-decision as the Pirates lost to the Astros in extra innings on Saturday.
Pedro Alvarez went 2-for-4 with a two-run homer in Friday's 5-4 win over the Astros.
Jeanmar Gomez was touched up for four runs (three earned) in 4 2/3 innings Friday in a no-decision against the Astros.