It certainly seems that navigating through the first week of training camp without losing someone important is a very difficult trick for the Cowboys.
In 2013, Tyrone Crawford was knocked out for the year on one of the first days of camp. It happens and it stinks. Heck, Sean Lee was out for the year in 2014 before camp even started. OTAs got him that year. Orlando Scandrick went in 2015 a little later in camp. It happens and it stinks. But, it is also football.
This season, it will be Kellen Moore. He will be lost "several months" with a broken leg sustained yesterday in a freak moment in camp.