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We can't say for certain that the Dolphins' offense actually got better during the offseason, but there's no accusing this franchise of inactivity.Reggie Bush, Jake Long, Davone Bess and Anthony Fasano are out. Mike Wallace, Brandon Gibsonand Dustin Keller are in. Second-year back Lamar Miller will be relied upon to replace Bush in the backfield, which should work out just fine. Second-year tackle Jonathan Martin will attempt to protect Ryan Tannehill's blindside, which could be a disaster.
So things will at least look different in Miami this year, if not significantly better. The most important variable, without question, is whether Tannehill can make a leap in his second NFL campaign.

As a rookie, Tannehill clearly demonstrated improvement in the final months of the 2012 season. In Weeks 1-10, he threw just five touchdown passes and nine interceptions; between Weeks 11-17, he passed for seven TDs and tossed just four picks. He also ran more often and more effectively in the second half. (Game log here). No, his year-end efficiency numbers didn't look anything like Russell Wilson's or RG3's, and he wasn't anywhere near Andrew Luck's neighborhood in terms of yardage. But we should at least give Tannehill credit for treading water at the highest possible level as an inexperienced 24-year-old.