Following the conclusion of the first week of the preseason, there are still questions surrounding the status of the Oakland Raiders and elite pass rusher Khalil Mack. If there is a chance Mack is on the trading block as his contract holdout continues, it raises the question if the Colts and general manager Chris Ballard should inquire about a possible trade to bring him to Indy. It likely can go without saying what type of an impact Mack would bring to the Colts defensive line and defensive unit as a whole. The No. 5 overall pick from the 2014 NFL Draft would bring elite production to a unit that has needed it desperately for years. Since entering the league in 2014, Mack has started every game