Critics have consistently argued that without that go-to guy, Chad Henne's offensive weapons will be limited, which will in turn limit his productivity and future Dolphins success.

But Miami's needs are not limited to the offense, and it's their struggling defense that requires the most improvement.

The offseason has seen some dramatic changes in the Dolphins defense, not least the decision to replace outgoing defensive coordinator Paul Pasqualoni with Mike Nolan.

Nolan’s task will be improving a side that allowed 390 points this season (the third highest in the AFC) and gave up a franchise-record—and NFL-high—140 points in the fourth quar...

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