By Joshua Rich
Updated February 04, 2009 at 06:44 AM EST

Bob Costas has agreed to join the fledgling MLB Network as a play-by-play announcer and host, according to The Hollywood Reporter. The television personality and noted baseball fan and scholar agreed to a cable-exclusive deal, meaning that he will no longer work for other cable outlets (his nearly three-decade stint on broadcast network NBC, for which he has anchored Olympics coverage, will continue unaffected). Thus, Costas will close shop at HBO, where he has hosted programs like On the Record With Bob Costas and Inside the NFL (before it moved to Showtime), and CNN, where he occasionally sat in for Larry King.

At the MLB Network, Costas will host a new Thursday-night program, MLB Network Studio 42With Bob Costas. His first guest is slated to be Los Angeles Dodgers manager Joe Torre.