In order to build a winning franchise in the NFL, a lot of variables have to be in place. From ownership down to the players, a sustainable model usually features an excellent structure that has effective leadership. Some may argue that the on-field talent is the most important puzzle piece since the players are the ones responsible for what happens on game day.The most effective way of adding talent that can provide an impact for a long time is to draft well. Rookies provide cheap labor as they develop, and if the right players are taken and developed, a roster can become deep with solid contributors. Thats how the Miami Dolphins need to rebuild their roster to contend for a Super Bowl.We previously looked at some big impact free agents that the Dolphins should look at to help improve the roster. Notice how those free agents are all young and wont become albatross contracts because of age. Stay cheap and young throughout the roster, and then pay the impact players found and developed through the draft.The best franchises operate in this fashion. The Seattle Seahawks, New England Patriots, Pittsburgh Steelers, Baltimore Ravens and Cincinnati Bengals have won a lot of games in the last decade and should be models for the Dolphins.Assuming that some of the free agents that we identified before do end up in Miami, there will be fewer holes throughout the Dolphins roster. Its important to remember that there are way more misses than hits in the draft because scouting is an inexact science. Few, if any master evaluating and projecting human development and personalities for football.Considering how Miami drafted under Dennis Hickey last year, weve compiled a very early seven-round mock draft for the Dolphins. Each player has been projected as best as possible at this early juncture for his or her possible draft slot based off my film work throughout the season.Lets jump in and see whom the Dolphins should grab in the 2015 NFL draft.Begin Slideshow Click here to read full news..