Mortensens first major job came with the Atlanta Journal-Constitution where he covered the Braves, Falcons, and the NFL for 8 years. Followoing that, he spent 2 years covering the NFL for The National under editor Frank Deford before joining ESPN in 1991, where he still works today. Mortensen is one of ESPNs leading contributors, providing reports for Emmy Award winning programs such as SportsCenter, Sunday NFL Countdown, Outside the Lines, and Espn.com. On top of all of that, he has his own webpage in connection with ESPN and also serves as an analyst for the NFL Draft.