Thursday Night Baseball includes a play-by-play announcer who has been on NBC Sports since what time period?
Thursday Night Baseball:  Longtime NBC Sports broadcaster Bob Costas is one of the play-by-play voices of the broadcasts. Bob Costas: Robert Quinlan Costas (born March 22, 1952) is an American sportscaster, on the air for NBC Sports television since the early 1980s.
early 1980s