Peter Kostis joined CBS Sports in 1992 as an announcer for the CBS Television Network's golf coverage. He also serves as USA Network's lead golf analyst.

Kostis is recognized worldwide for his teaching ability and, as a member of Golf Digest's teaching staff for more than 20 years, has had many famous students, including Steve Elkington, Bernhard Langer, Mark Calcavecchia, Tom Purtzer and Deb Richards. He has also helped several celebrities in their pursuit of mastering the game, including Kevin Costner, Maury Povich, Miami Dolphins quarterback Dan Marino and baseball notables Jim Rice and Mike Schmidt. Kostis is partners with Gary McCord in the Kostis/McCord Learning Center in Scottsdale, Ariz.