The Pirates selected Perdomo's contract from Triple-A Indianapolis on Saturday.
Perdomo holds a 3.18 ERA, 1.31 WHIP and a 35:16 K:BB ratio through 22.2 innings with Indianapolis. He has a bit of MLB experience -- 19.2 innings with the Brewers between 2020-21 -- but didn't find much success with 18 earned runs allowed. Chris Owings was designated for assignment to make room for Perdomo on the active roster.