Bob Costas retiring from MLB play-by-play announcing work after 42 years

• Costas, 72, bidding farewell to baseball commentary
• Hall of Fame announcer started with NBC in 1982

Bob Costas is bidding farewell to baseball, the sport he is perhaps best known for, and retiring as an MLB play-by-play announcer.

Costas, 72, confirmed his retirement to the Athletic on Thursday but said he will open up on his decision at a later date.