"We are thrilled to welcome Ben, a former Major League catcher and Delaware County native, to our Phillies broadcast team," Comcast SportsNet president Brian Monihan said in a statement.
"Ben is a true student of the game and has provided valuable insight to our Phillies pre- and postgame coverage. We are confident in Ben's ability to inform and entertain fans with his distinctive analysis and easygoing style during our game broadcasts."
Moyer left the booth after one season to spend more time with his family on the West Coast. Davis will join Tom McCarthy, Stairs and Gregg Murphy on TV. Mike Schmidt is expected to return to the booth. He broadcast only Sunday home games last season.
Scott Franzke, Larry Andersen and Jim Jackson will be on radio.
"Growing up a Philadelphia Phillies fan, this is a dream come true," Davis said. "I look forward to working with Mike, Matt, Tom and Gregg in the booth, and I thank Comcast SportsNet and the Phillies for this opportunity."
Davis, the second overall pick in the 1995 First-Year Player Draft out of Malvern Prep, played seven seasons in the big leagues with the Padres, Mariners and White Sox. He had been working pregame and postgame Phillies shows on Comcast the past four seasons.
Comcast had narrowed its choices to Davis and Kevin Stocker, the former Phillies' shortstop who works with Pac-12 Network.
Todd Zolecki has been the Phillies beat reporter for MLB.com since 2009, and has been covering the Phillies since 2003.
This story was not subject to the approval of Major League Baseball or its clubs.