Outfielder Ryan Sweeney was put on the 15-day DL with a right hamstring strain. Cubs manager Rick Renteria says Sweeney may be sidelined three to four weeks. Sweeney suffered the injury when he ran down a fly ball in left-center field during the eighth inning of Friday's game.
Coghlan hit .243 with five doubles, six RBIs and six stolen bases in 24 games with Iowa.
Left-hander Zac Rosscup was optioned to Iowa.