Garza has been dealing with a left oblique strain and has not pitched since Aug. 3. He is scheduled to rejoin the rotation on Wednesday.
In 2014, Garza is 7-7 with 104 strikeouts and an ERA of 3.58. The 30-year-old has made 23 starts this season.
In January, Garza signed a four-year, $50 million contract, which has a fifth-year vesting option for 2018. The deal could be worth up to $67 million, if Garza meets his performance bonuses.
Garza's return was part of the Brewers' September call-ups. The team also added left-handed pitcher Wei-Chung Wang, right-handed pitcher Jimmy Nelson, catcher Matt Pagnozzi, and outfielder Logan Schafer to the team's roster. On Sept. 1, Major League rosters expand from 25 to 40 players.
Entering Monday, the Brewers are tied with the St. Louis Cardinals for first place in the NL Central, as well as the second NL wild card spot.
- Sarah Barshop