Poll: Dolphins' biggest reason for hope

Training camp is a time for optimism around the NFL. Every team believes it has a legitimate shot at the playoffs -- and some teams even believe they are Super Bowl bound.

The Miami Dolphins, coming off an 8-8 season, have reason to believe they can end their five-year playoff drought. But what is the biggest reason for optimism?

Is it first-year offensive coordinator Bill Lazor? The Dolphins hired Lazor to jumpstart Miami’s 27th-ranked offense from a year ago. Lazor is speeding up the tempo and adding new concepts to Miami’s offense. The Dolphins only averaged 19.8 points per game last season.

What about starting quarterback Ryan Tannehill? He is 15-17 as a starter but has shown flashes throughout the past two seasons. Many quarterbacks make the leap in their third season. Will Tannehill do the same?

Finally, could it be Miami's offseason additions? The Dolphins signed free-agent left tackle Branden Albert, defensive tackle Earl Mitchell and cornerback Cortland Finnegan, in addition to draft picks such as right tackle Ja’Waun James and receiver Jarvis Landry. Will these pieces get the Dolphins over the hump?

Using our SportsNation poll, vote on Miami’s biggest reason for optimism. You can share your thoughts below or send a message via Twitter @JamesWalkerNFL.