In any year, training camp is a time when the best laid plans often go awry. The big risk is injury in practice or preseason games. Suddenly a team has to shuffle things to figure out how to replace a player on the depth chart, and often sign someone new to back-fill. This year, there is a different threat, and that is players who opt out of the season over concerns about COVID. The Dallas Cowboys had not seen anyone who was likely to make a significant contribution take that route until Sunday, when fullback Jamize Olawale decided he was not participating this season.