Hammer also was a correspondent for several programs including: the daily morning program Good Day New York, the entertainment news program Extra and E! channel's News Live.
During most of the 1990s, he was a host of VH1's Top 10 Countdown.
Hammer is a 1984 graduate of White Plains High School, White Plains, New York. He graduated with a degree in philosophy from the University of Hartford in 1988. He was involved with the Alpha Epsilon Pi Fraternity. AEPi is the only official Jewish fraternity in America.
Hammer began his broadcasting career at the age of 15, at WNBC radio in New York City. While in college he worked at WTIC-FM (Hartford, Connecticut). He later worked for WPLJ radio and Z-100 (WHTZ) radio, both in New York City.
Hammer appears as a model in the book Heartthrob: A Hundred Years of Beautiful Men (in which he is described as possessing "almost-too-good-looking-for-words attractiveness") and the October 1999 issue of Gym magazine. He also appears in The Mane Thing, a book by stylist Kevin Mancuso.