Gelb attended Temple University where he was sports director for the student radio station WHIP. He also interned at 94 WIP. On March 25, 2016 he was hired as PD and host for WNJE Fox Sports 920 the Jersey, the only Fox Sports Radio affiliate in the area. In August 2017 he began working Eagles Postgame on WPEN (FM). On March 1, 2018 Gelb announced he would be leaving WNJE for a national show 2–6 AM EST weekends with CBS Sports Radio.