Acquiring players and coaches may get all the publicity and media attention, but they're not the only means for the Dallas Cowboys to get better as a team. The development of the individual players also raise the level of play of the team as a whole.With that in mind, let's dive into a few players who are most likely to improve in 2019:Dak PrescottWhen Jon Kitna was hired to take over for Kellen Moore, who was promoted to offensive coordinator, as the Cowboys' quarterback coach, one quote from Dak Prescott stood out (via SportsDay's own David Moore):"I'm excited for what I can learn, what he can teach me, knowing how serious he takes footwork ...