He played college football for the Indiana Hoosiers and was selected by the Tennessee Titans in the third round of the 2005 NFL draft.

Roby also played in the NFL for the Cincinnati Bengals, Indianapolis Colts, New Orleans Saints, and Atlanta Falcons.

Roby attended North Central High School in Indianapolis, Indiana where he starred in both football and track for the Panthers.

As a member of the Indiana University track and field team, Roby competed in the 100 m dash and 4 × 100 m relay.

As a junior he placed fourth in the Big Ten Conference Championships 100 m. Roby was selected by the Tennessee Titans in the third round of the 2005 NFL draft.

Courtney finished the season ranked third in the NFL for kick return yardage and was the primary kick returner and top special teams contributor during their run to a victory in Super Bowl XLIV, leading to being voted as the Saints’ Special Teams MVP.

In the December 12, 2010, game against St. Louis, Roby suffered an apparently serious concussion and neck injury on a kickoff return; he was removed from the field on a cart and taken to the hospital by ambulance.