There's been a lot of buzz surrounding the Denver Broncos' selection of running back Jonah Coleman in April's draft. With J.K. Dobbins re-signed and RJ Harvey entering Year 2, the Broncos needed a third back in the rotation who is an upgrade over Tyler Badie and Jaleel McLaughlin. The offense also needed an infusion of power, especially if Dobbins goes down with an injury again. However, there's a major concern for the Broncos with Coleman joining the backfield, and it doesn’t really have much to do with him. The issue the Broncos face will come down to snap and touch share with Dobbins and Harvey, and making a " three-headed monster " rushing attack work. It's doable and has been done before, but there's a reason teams mainly run a two-back attack, with a third in the stable for a small handful of snaps per game.  Snap Share Denver Broncos running back J.K. Dobbins (27) runs the ball in the fourth quarter against the Las Vegas Raiders. | Isaiah J.…