"Harry's the voice of the Phillies and we're delighted he plans on continuing his Hall of Fame career," manager of broadcasting for the Phillies Rob Brooks said in a statement.
"I'm excited to be able to continue calling Phillies games," Kalas said. "I really like the makeup of this club. The future -- with Ryan Howard, Chase Utley and Jimmy Rollins -- is very bright."
Kalas began broadcasting Major League Baseball with the Astros in 1965, and has been in Philadelphia since '71. That makes him the eighth-longest tenured broadcaster, behind Los Angeles' Vin Scully and Houston's Milo Hamilton, among others.
"I can't imagine growing up with anyone other than Harry Kalas broadcasting Phillies games," Mike Piazza, who grew up in Norristown, Pa., once said. "I truly didn't consider myself a Major Leaguer until I heard him do his first call for me."
Kalas was enshrined in the broadcasters' wing of the Baseball Hall of Fame in Cooperstown, N.Y., in 2002, when he won the Ford C. Frick Award.
Matthews was a Major League outfielder for more than 15 years, including three years in Philadelphia, 1981-83. He was the MVP in the 1983 National League Championship Series, when the Phillies defeated the Dodgers. He also played for the Giants, Braves, Cubs and finished his career with the Mariners in 1987. His son, Gary Matthews Jr., is also a big-league outfielder, and recently signed a five-year, $50 million contract with the Angels.
Matthews, 56, served as a color analyst for Toronto radio broadcasts from 2000-01. Since then, he has been a coach with the Brewers (2002) and Cubs (2003-06), and wasn't retained by new manager Lou Piniella.
Specific roles of the broadcasters will be determined in Spring Training.