No quarter is given (or expected) in the red-in-tooth-and-claw environs of US network television.

Little surprise, then that Sandy Grushow, chairman of NewsCorp-owned Fox Television Entertainment Group has quit in the wake of a disastrous six-month plunge from ratings leader to number four in a field of four.

Gruhow insists he was not pushed but jumped. "I felt no pressure whatsoever. I had every opportunity to stay. This is a life decision which I had the good fortune and freedom to make."

His "life decision" will center on a startup TV-program production company, a common exit route for network executives anxious to get out from under the Sword of Damocles.

Fox said it doesn't have plans to fill Grushow's position, his erstwhile duties now shared between other top Fox executives.

Data sourced from: The Wall Street Journal Online; additional content by WARC staff