Chan Gailey’s duty: Develop Tua Tagovailoa, build up Dolphins’ offense

The 68-year-old former retiree returns to Miami with a stacked to-do list as the O-coordinator of a team with a rookie QB as the face of the franchise.The 68-year-old former retiree returns to Miami with a stacked to-do list as the O-coordinator of a team with a rookie QB as the face of the franchise.

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