Schefter joined the NFL Network in 2004 and appeared on NFL Total Access and also wrote for NFL.COM. Before joining NFL Network Schefter appeared frequently on ESPN's Around the Horn as a substitute for Woody Paige, who was based in Denver at the time. Before Around the Horn, Schefter appeared on ESPN's The Sports Reporters. Schefter appeared on NBC twice in the summer of 2008, working as the sideline reporter for Al Michaels and John Madden during the Redskins-Colts Hall-of-Fame game and then the Redskins-Jaguars preseason finale.
According to a USA Today survey of fans published January 19, 2009: "NFL Network's Adam Schefter edged ESPN's Chris Mortensen (34%-32%) for best [NFL] insider despite the NFL Network being in less than half as many U.S. households." Schefter was selected as the best (NFL) insider in another USA Today poll in November 2010. Schefter was voted USA Today's best "insider" for a third straight year in November 2011.
In 2009, Schefter became a football analyst with ESPN. He began appearing on air on August 17, 2009. In October 2010, Sports Illustrated writers included Schefter in its "Power 40+", a listing of the NFL's most influential officials, executives, coaches, players and media members.