MIAMI GARDENS — When the Miami Dolphins brought defensive coordinator Anthony Weaver onto the coaching staff this offseason, it was known it could be a one-year rental. Why? He’s too good of a coach to be kept in the coordinator ranks for long. Weaver’s name had already come up in interviews for head coaching vacancies last offseason, and it’s sure to happen again after a season that has three weeks left with the Dolphins facing the San Francisco 49ers in their home finale on Sunday. Miami’s defensive coordinator, who came from coaching the defensive line of the Baltimore Ravens the previous three seasons, the last two of which he also held the assistant head coach title, can command a room.