Tommy Lasorda among those to congratulate Mike Piazza, Ken Griffey Jr.

ANAHEIM, CA - APRIL 24: Ken Griffey Jr. #24 of the Seattle Mariners takes batting practice before the game against the Los Angeles Angels of Anaheim on April 24, 2009 at Angel Stadium in Anaheim, California. The Mariners won 8-3. (Photo by Stephen Dunn/Getty Images) PORT ST LUCIE, FL - FEBRUARY 27: Mike Piazza #31 of the New York Mets poses for a portrait during Mets Photo Day on February 27, 2005 at Tradition Field in Port St. Lucie, Florida. (Photo by Ronald Martinez/Getty Images)

Ken Griffey Jr. and Mike Piazza are baseball's newest Hall of Famers.

After the initial shock, amazement and joy wear off, both superstars are going to have to return a lot of texts and voicemails.

Among the congratulatory notes on Twitter: