EXCLUSIVE: I heard this late last night but confirmed it this morning. This week is his last. Several sources tell me Steve Mosko took the step because of Oswaks’ management style. He was a ”completely ineffective marketer, in addition to his constant internal struggles with key management caused the abrupt departure. Oswaks had many complaints against him including the fact that Harpo (Dr. Oz, Nate Berkus) thought he was completely inept.”

Editor-in-Chief Nikki Finke - tip her here.

For all of Deadline's headlines, follow us @Deadline on Twitter.