MIAMI GARDENS — The Miami Dolphins are alive for another week. Kicker Jason Sanders made all five of his field goals, and the Dolphins held off the San Francisco 49ers late, with running back De’Von Achane’s 50-yard touchdown run the exclamation point on a 29-17 win in their home finale Sunday evening at Hard Rock Stadium. Miami (7-8) staved off elimination, as it would’ve mathematically been out of playoff contention with a loss. “We’ve been waiting for a three-phase game, which I think we had (Sunday),” Dolphins coach Mike McDaniel said.