He spent five days working with former NFL quarterback and IMG Academy mentor Chris Weinke in February.
"He's that franchise type quarterback you build your team around who is going to continue to climb," Weinke said. "I just truly believe he's going to do great things down there in Miami."
Recently retired Garrard spent time with Tannehill last month at the charity golf tournament hosted by ex-Dolphin and current Kansas City Chiefs tight end Anthony Fasano in New Jersey. Garrard views Tannehill as a talented, hard-working leader who is the primary reason why the Dolphins believe they have a playoff chance.
According to Garrard, Tannehill has nearly everything Tom Brady has — including a model wife and a strong, accurate arm. But Tannehill is obviously lacking in two major categories: experience and those three Super Bowl rings.
"Tom Brady is getting up there in years," Garrard says of the soon-to-be 36-year-old New England Patriots quarterback. "I would say Ryan is the next guy to take over that position in the AFC East. ... Ryan is going to be great. He definitely has a chance to be a fabulous quarterback in this league.
"He has a great arm and has great command of that offense. He came across as a 10-year veteran last year when he took command in an offensive meeting, and (then) he started barking out things to veterans and coaches. ... I'm really looking forward to watching his career unfold."
So is Wallace, who says Tannehill has what it takes to become a championship-caliber quarterback in the mold of his former Pittsburgh Steelers teammate, Ben Roethlisberger. Wallace was impressed with how Tannehill called his receivers, tight ends and running backs together for two weeks of impromptu throwing sessions before Miami's organized team activities in May.
"We're still getting a feel for each other," Wallace said. "Sometimes I underestimate his arm. He can throw as good a deep ball as anybody in the league. As long as he keeps working, he'll take us where we hope.
"He's a real cool guy, real laid back, and he's working hard to get better. I really like that about Ryan."
As Tannehill acknowledged after an erratic practice when Sherman's intent was to increase the offensive pace and tempo, this new era in Miami is still a work in progress. But there are plenty of reasons to believe, beginning with a more confident, decisive Tannehill.
Could his touchdown pass total jump from 12 to 24?
"Adding the speed we added to vertically stretch the field, I'd like to see our numbers dramatically increase," Tannehill said. "I'm not going to throw out numbers. But it will definitely be higher."
Those numbers need to increase significantly for the Dolphins to push the Patriots fulfill their splashy offseason expectations.