The Cubs will call up outfielder Luis Montanez from Triple-A Iowa on Tuesday, according to a source. A corresponding move will be announced and it's possible pitcher Matt Garza will go on the disabled list. Garza, who missed his last start, is suffering from elbow stiffness. Montanez was Chicago's first-round pick and third overall in 2000, but he's never played for the Cubs in the majors.