Dick Ebersol, who has run NBC Sports since 1989, announced Thursday that he has resigned.
Ebersol's decision comes several months after Comcast's takeover of NBC Universal. Earlier this year Comcast named Ebersol to run the NBC Sports Group, which consists of NBC Sports, Golf Channel, Versus and Comcast’s regional sports networks.
Under Ebersol, NBC televised eight Olympics, but Ebersol said he will not attend the June auction in Lausanne, Switzerland, that will determine who acquires the rights to the 2014 Winter Olympics in Sochi, Russia, and the 2016 Summer Games in Rio de Janeiro.
'What I have enjoyed most is working so closely with so many truly outstanding and incredibly talented people over decades of producing some of the greatest events in the world,' Ebersol said. 'Those relationships are what I cherish most.'
Mark Lazarus, president of NBC Sports Cable Group, will become new chairman of the NBC Sports Group.