The only constant with Ryan Tannehill is change. The 2016 season means the Dolphins quarterback will be playing for his third head coach and fourth offensive coordinator in only five years.

The Joe Philbin-Mike Sherman combination failed. So did trying to accelerate Tannehill with Bill Lazor. Enter head coach Adam Gase and and fellow QB whisperer Clyde Christensen to try to establish a long, beautiful relationship with him.

Gase got the best out of Peyton Manning, Jay Cutler, and yes, even the extremely-limited Tim Tebow. Christensen's recent OC resume includes working with Manning and Andrew Luck in Indianapolis.

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Tannehill hasn't been terrible, but his development has become stagnant. He's been above average, but his current ceiling is far from the league's best at his position. Gase has done well to work both with athletic passers and those who have arm limitations. Cutler was Gase's most physically talented pupil; Tannehill is a close second, and as he turns 28 in July, he also has youth on side.

While Gase's leadership and scheming is the Dolphins' biggest change, they're also remixing their defense under new coordinator Vance Joseph. Here's a positional breakdown of new-look Miami a month ahead of the team starting training camp.

Quarterbacks. Gase and Christensen have done a lot pre-camp with Tannehill. They brought Manning in for some extra instruction. They've thrown everything in the playbook at Tannehill, with an emphasis on having him handle an up-tempo, no-huddle attack. They've granted Tannehill's wish for wanting to call more of his own plays at the line.

There have been mixed reviews so far, as Tannehill has had some inaccuracy and inconsistency issues while trying to nail down the mental aspects. He'll need to use camp to become a whole lot crisper to make us believe he'll take the proverbial next step of which he's capable. Behind him, the only notable change was drafting a seventh-round project, Brandon Doughty.

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Running backs. The Dolphins didn't want to pay to keep the dynamic Lamar Miller, whom they underused, anyway. They also were attached to Arian Foster — whom Miller replaced in Houston — in free agency and Ezekiel Elliott in the draft. They ended up sitting on second-year back Jay Ajayi as their new featured option and drafted rookie third-rounder Kenyan Drake as his third-down support. Ajayi, who wasn't healthy enough or reliable in pass protection enough to do much as a rookie, has wowed Gase as both an inside power runner and quick outside runner.

Slimmer and sleeker, Ajayi is set up for a heavy early-down workload. Drake will need to play a lot, however, because Ajayi still has limitations in the passing game. Drake needs to shake off his hamstring injury in camp to contribute well right away as the change of pace. If Drake can carve out a good "Sproles Role" as a rookie, it would be huge for Gase and Tannehill.

Wide receivers. The Dolphins didn't bring back the underrated Rishard Matthews because they're expecting an explosion from second-year wideout DeVante Parker as a co-No. 1 to Jarvis Landry. Parker saw his rookie year almost wiped out because of a lingering foot injury, but he showed his elite upside as a big playmaker (6-3, 218 pounds) in the final six games. Gase wants him to become the Demaryius Thomas to Landry's Emmanuel Sanders — he knows how well that worked for the Broncos.

Behind that strong, hard-to-cover duo are holdover Kenny Stills and rookie draftees Leonte Carroo and Jakeem Grant. Stills flamed out as a former Saints deep threat last season and still looks like a misifit for Tannehill. He's a straight-line outside guy, not ideal for No 3. That leaves room for the good route-running Carroo to earn that job in camp, because he would give the Dolphins nice slot versatility in sets with both Landry and Parker. Grant is being tabbed to help relieve Landry in the return game. Tannehill is well equipped here and must take advantage of it.

Tight ends. Jordan Cameron was a free-agent bust coming from Cleveland last season, with only 35 catches for 386 yards and 3 TDs despite playing all 16 games for the first time in his career. Cameron took a paycut to stay and play for Gase to redeem himself before he'll be on the open market again in 2017. Gase has done great work with tight ends in his previous stops, and should make better use of Cameron's athletic receiving talents. As a short-to-intermediate option in Tannehill's wheelhouse, it makes sense to make sure he's the third-most targeted after Landry and Parker. Cameron won't hit his huge stats in '13 with the Browns, but 60-600-6 is a reasonable expectation.

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Jordan Cameron (Getty Images)

Offensive line. Where will first-round pick Laremy Tunsil play, and when will he play there? That's the biggest question in 2016. At the moment, his best bet is left guard, but so far he hasn't been able to displace Dallas Thomas. Tunsil won't play left tackle in the short term with Brandon Albert still anchored there, but if he can't pass Thomas in camp, he will try to at least push mediocre right tackle Ja'Wuan James. The other guard spot is a battle against a former tackle, former Bear Jermon Bushrod, and a holdover, Billy Turner. That puts a lot on center Mike Pouncey to help bring it all together around him. The Dolphins' line wasn't very good in '15, so it would be nice if Tunsil can do something to help. It should be improved in some way solely because of the influence of Gase and young line coach Chris Kuper.

Defensive line. With the Bengals, Joseph coached defensive backs for the past two seasons, but he saw how effective their attacking front was in the 4-3 under Paul Guenther. There's hope then that tackle Ndamukong Suh can be a lot better rushing the passer inside after doing little of note in his first season with the Dolphins. Suh is familiar with the concepts and should see how successful a similar player, Geno Atkins, worked in the system. Helping the cause is end Cameron Wake, who's back healthy and built to thrive again as an edge pass rusher. Opposite Wake, they need aging Mario Williams (31) to catch a second wind away from Buffalo. A new scheme, new team and new role as more of a complementary option all should allow him to shake off a bad five-sack season with the Bills.

There will be a battle for the second tackle and fourth spot in a front that can start living up to its immense potential. Earl Mitchell provides the steady veteran, while second-year second-rounder Jordan Phillips, who struggled against the run as a rookie, can make more flashy plays in the backfield. Given Suh's upside in the defense, going more expected and complementary with Mitchell makes sense with Phillips rotating in often in pass-rush situations. The Dolphins should be up to about 45 sacks after producing only 31 last season.

Linebackers. The Dolphins were worse at linebacker, but the only notable change was trading for Kiko Alonso to start in the middle between Koa Misi and Jelani Jenkins. Alonso finally is fully healthy from his knee injuries, and reports are he ran around like it in the early offseason program. After his one ineffective season with the Eagles and now three years removed from his stellar rookie splash, the key is whether Alonso can consistently fly around and make those big plays again in actual games. There's a feeling that Alonso will either have a major setback or a huge comeback. The latter would significantly raise the takeaway count after a dismal total of 16.

Secondary. Byron Maxwell, the other part of the Eagles trade, will replace Brent Grimes as one starter at cornerback. The other spot will come down to a heated training camp battle between second-year fifth-rounder Tony Lippett and rookie second-rounder Xavien Howard. There's even more uncertainty at nickel back with second-year fifth-rounder Bobby McClain with a tenuous lead. It's hard to trust Maxwell or youth to serve Miami well, as their coverage remains a weak spot. Joseph is doing the best with what he has to hold up on the back end, making it critical the pass rush comes through.

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It's also good the Dolphins are in much better shape at safety. Stud strong safety Reshad Jones should get paid with the new deal he wants sometime in camp. Signing former Lion IIsa Abdul-Quddus to start next to him was one of the best unheralded moves in free agency. They will combine to provide solid run support and give Joseph strong interchangeable blitzers at the position. The safeties will need to play over their heads, over, to make this more than an average secondary overall.

Bottom line. It's a familiar tune in South Florida: The Dolphins have some top-tier talent and a quarterback who should be a lot better than he is. Gase, Christensen, Joseph and the rest of the staff are charged with getting a lot more out of every player in addition to getting everyone to grasp their schemes. It sets up the Dolphins for an improved attitude and results, but the hard cap is back to .500.