Looks like Nat had some good workouts with the Vikings - short blurb here:
After meetings with scouts and coaches, Tice named a handful of players who had impressive offseasons: cornerback Ken Irvin, defensive end Chuck Wiley, Jones, offensive tackle Mike Rosenthal, tight end Jermaine Wiggins, rookie running back Mewelde Moore, offensive tackle Nat Dorsey and receivers Nate Burleson, Keenan Howry and former Gopher Aaron Hosack.