Worley joins a crowded cornerback room that includes Chidobe Awuzie, Jourdan Lewis, Anthony Brown, Maurice Canady and C.J. Goodwin as well as the team's recent draft picks, Trevon Diggs (second round) and Reggie Robinson (fourth round).
Worley, who joined the Raiders as a free agent in 2018, became a Jon Gruden favorite last season thanks to his willingness to play all over the secondary, from outside corner to the slot to free safety.
The 6-foot-1, 215-pound Worley, 25, missed one game last season with a neck injury, in Week 15, and finished with an interception, a fumble recovery, 8 passes defensed and 58 tackles (51 solo).
He signed with the Raiders after the Philadelphia Eagles released him following his arrest near the team facility when he was allegedly found passed out inside a vehicle blocking a highway, according to NFL Network. He ultimately pleaded guilty to three charges, including driving under the influence. The NFL suspended him for the first four games of the 2018 season. Philadelphia had acquired him during that offseason in a trade with the Carolina Panthers.
Worley, a third-round pick of the Panthers in 2016 out of West Virginia, has five career interceptions. Dallas has not had a cornerback with more than three interceptions in a season since Terence Newman had four in 2011.
ESPN's Todd Archer and Paul Gutierrez contributed to this report.