Will Smith was unavailable for Friday's game against the Nationals due to back spasms.
Will Smith struck out four of the five batters he faced Wednesday against the Orioles, lowering his ERA to 0.36.
Will Smith recorded a one-out save, his first of the year, against the Pirates on Sunday.
Brewers manager Ron Roenicke said Will Smith looked "incredible" during his last bullpen session.
Milwaukee's signing of Matt Garza enables the club to use left-hander Will Smith out of the bullpen, according to FOX Sports' Ken Rosenthal.
Brewers acquired LHP Will Smith from the Royals for OF Norichika Aoki.
Royals recalled LHP Will Smith from Triple-A Omaha.
Royals optioned LHP Will Smith to Triple-A Omaha.