Optimism is flowing high this summer with the Miami Dolphins. This is the most talented roster the team has put together under fourth-year head coach Joe Philbin, and offseason practices were crisp and productive.

Dolphins quarterback Ryan Tannehill also was a tone-setter for Miami. The former 2012 first-round pick put together his best offseason, as evident with his consistency on the practice field.

In previous seasons, Tannehill often alternated good and bad practices or followed up two good sessions with a bad practice. That trend also showed up on game days.

But this offseason, Tannehill was consistently steady in organized team activities and training camp, which is a very good sign for the Dolphins.

"I feel like every day we got better and learned something new," Tannehill said last month. "We're trending in a great direction. I like the guys that we have. I'm excited for training camp so that we can continue to hone our craft, what we do and continue to build our chemistry and be ready to go."

A major reason for Tannehill's strong offseason is his increased comfort level -- he's entering his second season operating offensive coordinator Bill Lazor's scheme.

Tannehill's $96 million contract extension in the spring also helped his confidence and leadership. The Dolphins made a statement with the extension that this is Tannehill's team and whoever doesn't fall in line won't be around very long.

Team chemistry will be something to watch in Miami with Tannehill taking a major leadership role. Chemistry issues have plagued the Dolphins recently, including their 2013 bullying scandal and Mike Wallace's benching at the end of last season.

"We definitely have fun," Tannehill said of this year's group. "I think our chemistry is great for this point only being together eight weeks. I feel like we're in a great spot right now and it will only continue to get better."

The Dolphins will resume their 2015 journey when they begin training camp practices on July 30.