New general manager Jeff Ireland met with Sparano in Dallas. The Dolphins fired Cam Cameron last Thursday after he went 1-15 in his first year as an NFL head coach.
Frazier, 48, was a defensive backs coach and special assistant to Indianapolis coach Tony Dungy for two seasons before joining the Vikings a year ago. In 2007, Minnesota's defense was No. 1 against the run for the second consecutive season but finished 20th overall because a bottom-ranked pass defense.
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