First of all, Marino did not always have a better defense than Tannehill. His defense was unquestionably worse, at least from 1986-1988, and probably some other years too. Put Tannehill on those teams and they’re not getting to 8-8— the record Marino dragged them to.
As for initial post: can the team win a Super Bowl with Tannehill— yes. Will the team win the Super Bowl with Tannehill— doubtful. And if he needs the 2000 Baltimore defense or the 2015 Denver Broncos defense to do it, then who cares because it could be anyone at QB in those cases.
As for initial post: can the team win a Super Bowl with Tannehill— yes. Will the team win the Super Bowl with Tannehill— doubtful. And if he needs the 2000 Baltimore defense or the 2015 Denver Broncos defense to do it, then who cares because it could be anyone at QB in those cases.