From the National Football Post:
I hear the order in Detroit today is Jim Schwartz of the Titans, Jason Garrett of the Cowboys and Leslie Frazier of the Vikings.
Michael Lombardi also claims that Raheem Morris will be one of the three candidates to receive a second interview in Denver. Garrett may or may not be a finalist there.
Update: The Detroit Free Press is now quoting Lombardi that Garrett is, "the guy [the Lions] think can turn their franchise around."