Football might be the ultimate team game, but you won't find many general managers unwilling to trade a decade's worth of draft picks for a time machine to go back and build around any of these players. But just who is the greatest player in the history of Cowboys football? Leading up to ESPN.com's 2008 NFL preview, we're asking for SportsNation's help in sorting out the history of each franchise. Namely, we need your help crowning the all-time greats. Voting includes all players in a franchise's history, regardless of location (Baltimore and Indianapolis Colts, for example). Final results will be revealed Aug. 18 on ESPN.com.