Carpenter, who is expected to sign the contract soon, and Santangelo will work together for the third consecutive season for the Mid-Atlantic Sports Network. Neither Carpenter nor Santangelo were available for comment.
Carpenter has been with the Nationals since 2006 and is known for the catch phrase, "See -- you -- later," whenever a Nationals player hits a home run.
Santangelo, who is Carpenter's fifth TV partner, is best known for the catch phrase, "Are you kidding me?" whenever he sees a great play on the field.
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time. He also could be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.