John D Zeglis (born May 2, 1947) is an American business executive. He served as president of AT&T from 1997 to 2001 and as chairman and chief executive officer (CEO) of AT&T Wireless from 1999 to 2004. Zeglis also co-founded the NBA G League's Fort Wayne Mad Ants and served as president and primary shareholder of the organization from 2007 until the acquisition of the team by Pacers Sports and Entertainment in 2015.