Still, the Minnesota Vikings' opening week of training camp created real movement in the quarterback race, introduced several rookie playmakers and exposed one offensive operation that needs immediate tweaking. Winners and losers from the first week of Minnesota Vikings training campWinner: Kyler MurrayKyler Murray's week was uneven, but its trajectory mattered. Winner: Charles DemmingsThe rookie corner turned an unexpected opportunity into a legitimate camp story. J.J. McCarthy completed a high percentage of mostly short throws early in the week, but Saturday was costly. He was involved in an off-target shotgun snap Wednesday, then another poor snap Thursday as Minnesota's top two centers continued fumbling quarterback exchanges.