The Milwaukee Brewers are trying to fill their fifth starter spot and while they may get that done from within, they are keeping an eye on the waiver wire and trade market, Adam McCalvy of MLB.com reports.

“We probably will” fill from within, general manager Doug Melvin said.  “It’s very difficult to make trades at this time of year because other teams are trying to preserve their depth. We’re making a lot of calls.”

The team is already short an ace with Zack Greinke out due to a cracked rip and right-hander Shaun Marcum is experiencing shoulder stiffness.

McCalvy says the team is not interested in free agents Doug Davis, Oliver Perez or Kevin Millwood.

Internal candidates that could fill the void include Wily Peralta, Marco Estrada, Eulogio De La Cruz La Cruz and Tim Dillard.