Peguero was optioned to Triple-A Nashville on Thursday.
The Brewers recalled Peguero from Triple-A Nashville on Tuesday, Adam McCalvy of MLB.com reports.
The Brewers optioned Peguero to Triple-A Nashville on Monday, Curt Hogg of the Milwaukee Journal Sentinel reports.
Peguero picked up the save Tuesday against the Rangers, striking out one during a perfect ninth inning.
Peguero earned the save in Thursday's 6-4 win over the Cubs, allowing one hit in a scoreless ninth inning.
Peguero (elbow) has struck out two while allowing one earned run on two hits and one walk over two innings through his first two Cactus League appearances.
Peguero was placed on the 15-day injured list Wednesday, retroactive to Sept. 17, with a right elbow effusion, Sophia Minnaert of Bally Sports Wisconsin reports.
Peguero tossed a scoreless eighth inning in Monday's 12-1 victory over the Rockies.
Peguero picked up his first career save Sunday against the Guardians after striking out two and not allowing a hit in the 10th inning.
Peguero tossed a scoreless 10th inning and picked up the first win of his career in Friday's victory over the Reds.