Entering his sixth season of professional baseball, John Sadak handles the radio play-by-play for all 140 Blue Rocks games. The 29-year-old graduated from Rowan University in Glassboro, NJ with a bachelor's degree in Communications (Radio/TV/Film) in 2000, and a master's degree in Public Relations in 2003. His previous experiences in baseball include spending the 2003 season as a producer for the Lakewood BlueClaws, the Philadelphia Phillies Single-A affiliate in the South Atlantic League. He has also worked for both Major League Baseball Productions and in the front office of the New York Yankees as the Bombers' Assistant Director of Scoreboard & Broadcasting Operations.

In the off-season, Sadak is an award-winning announcer for Princeton University men's basketball, University of Delaware women's basketball and Northeast-10 Conference football.

He has also filled in for University of Delaware men's hoops play-by-play, Princeton University men's ice hockey, UD football coverage and as the host of local sports talk show, In The Zone, on Sports Radio 1290 The Ticket. In 2006, the Colonial Athletic Association tapped Sadak to announce the CAA women's basketball championship game on Sirius Satellite Radio. John lives in Newark, DE.