Ross Greenburg is stepping down as president of HBO Sports after more than a decade in charge of the cable channel's sports programming.
Greenburg, who joined HBO in 1978 as a production assistant, says he had been considering leaving for a couple months as the pressure and time commitments began to wear on him.
Particularly draining, he said were boxing negotiations.
Greenburg says he plans to speak to his staff Monday, and spend the week tying up loose ends.
He says he decided he wouldn't renew his contract when it expired at the end of 2011, and that HBO was gracious enough to let him out of it early.
Greenburg's last major project was an upcoming documentary of Yankees star Derek Jeter's road to 3,000 hits.