Manager Mike Quade officially named Randy Wells as his fourth starter on Friday, while also confirming that James Russell and Jeff Samardzija have made the staff.
That leaves one opening on the 12-man staff for either Carlos Silva, Braden Looper, Casey Coleman or Marcos Mateo.
As for Wells, Quade joked: "We gave him a map today to make sure he knows Chicago is northeast of here.... We'll put him on the charter to make sure."
Wells erroneously said last week that the Cubs would be headed Northwest after leaving Arizona.
"He's the best," Quade said. "He's had a marvelous spring."
Wells starts today against Seattle at HoHoKam Park.
Quade hasn't named his fifth starter yet, though Andrew Cashner and Silva are the two finalists. Cashner will be on the team either way.
"Cashner is on the club," Quade said. "What we don't know for sure yet is (his spot). We're looking hard at him as the fifth starter, but there are other scenarios there where that doesn't materialize. So basically, we're looking for one pitcher."
Silva will either be a starter, reliever or be released, with the Cubs obligated to pay all but the major league minimum from his $11.5 million salary in 2011.