Romero (appendectomy) will begin a rehab assignment Tuesday at High-A Wisconsin.
The Brewers optioned Naylor to Triple-A Nashville on Monday.
Uribe (forearm) will begin a rehab assignment at High-A Wisconsin on Tuesday.
Drohan (6-5) allowed two runs on eight hits and three walks while striking out five over five innings to take the loss versus Atlanta on Sunday in the Little League Classic.
Mlodzinski allowed three runs on five hits, no walks and a hit-by-pitch while striking out four over three innings of bulk relief in Sunday's 4-0 loss to the Dodgers.
Mitchell suffered a right forearm contusion Sunday against Atlanta, Todd Rosiak of the Milwaukee Journal Sentinel reports.
Mitchell (arm) exited Sunday's contest against Atlanta in the fifth inning after being hit by a pitch, Adam McCalvy of MLB.com reports.
The Brewers recalled Naylor from Triple-A Nashville to serve as the 27th player for Sunday's Little League Classic against Atlanta, Todd Rosiak of the Milwaukee Journal Sentinel reports.
Davis is out of the lineup for Sunday's game against the Dodgers.
The Pirates optioned Kelly to Triple-A Indianapolis on Sunday.
