Germano, who was acquired from the Red Sox in July 19, has just one outing since joining the Cubs, a three-inning relief stint at St. Louis last week when he gave up one run on five hits. He was a starter at Triple-A Pawtucket, but has just his one outing with the Cubs since July 7.
Germano will take the rotation spot vacated by Matt Garza, who is still suffering the effects of a sore right triceps. Garza won't return to the rotation until next week at the earliest.
Technically, the Cubs do not have a second rotation vacancy this week, but will Tuesday night against the Pirates if a Ryan Dempster trade finally goes down.