Serven went 2-for-4 with a three-run home run in Sunday's 7-6 win over the Astros.
Harris recorded a save Sunday against the Astros, striking out two in a perfect ninth inning.
Perkins (3-9) earned the win Sunday against the Astros, allowing three runs (one earned) while walking five and striking out six over five innings of relief.
Mlodzinski allowed three runs on five hits, no walks and a hit-by-pitch while striking out four over three innings of bulk relief in Sunday's 4-0 loss to the Dodgers.
The Pirates optioned Kelly to Triple-A Indianapolis on Sunday.
Davis is out of the lineup for Sunday's game against the Dodgers.
The Pirates recalled Curtis from Triple-A Indianapolis on Sunday.
Mangum is out of the lineup for Sunday's game against the Dodgers.
Triolo will start at shortstop and bat eighth in Sunday's game against the Dodgers.
Muncy will start at designated hitter and bat sixth in Sunday's game against the Astros.
