The team optioned infielder Pedro Ciriaco and pitcher Aaron Thompson to Triple-A Indianapolis and recalled outfielder Alex Presley and infielder Chase d'Arnaud from the farm club and activated them off the 15-day disabled list.
Ciriaco, 25, had three hits in 12 at-bats with two RBI and two runs scored in 11 games this season for the Pirates, while Thompson made his major league debut for Pittsburgh on Wednesday, going 4 1/3 scoreless innings in a 2-0 shutout of the Milwaukee Brewers.
Presley, 26, had been on the disabled list since July 23 with a left thumb contusion. In 20 games for the Pirates this season, Presley batted a robust .333 with a home run and nine RBI.
d'Arnaud had also been on the DL with a chip fracture in his right pinkie finger. The infielder has played in 25 games this season, compiling a .225 average with three RBI and 11 runs scored.