The Cubs recalled Mastrobuoni from Triple-A Iowa on Sunday.
Back up for his fourth stint of the season with the Cubs, Mastrobuoni projects to fill a utility role for the big club, much like he did on the previous three occasions. As a left-handed batter, Mastrobuoni won't have a path to a short-side platoon role, so his playing time will likely be sparse in September unless the Cubs lose one of their lineup regulars to an injury.