Bob Costas

NBC's Bob Costas being replaced by Mike Tirico at Olympics

Mike Tirico is taking over from Bob Costas as the prime-time host of NBC's Olympics coverage starting next winter in South Korea.

Costas, who has been the on-air concierge to NBC's Olympics 11 times starting in 1992, said he decided on his own a year ago that the time was right for a change.

"This is entirely on my terms and I like it that way," Costas said Thursday. He said he wants to do some commentary on special events — maybe even the Olympics — and long-form programming, likening his new role to what former news anchor Tom Brokaw does at NBC. He also wants to broadcast more baseball to get his fastball back, saying he listened to old tapes and realized he...

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