The Minnesota Vikings’ quarterback competition between Kyler Murray and J.J. McCarthy is a central focus of training camp and the upcoming preseason, with Kyler Murray widely viewed as the early leading candidate and coach Kevin O’Connell highlighting his mental grasp of the offense as the team weighs changes to the scheme. As Minnesota prepares for the Aug. 15 preseason against the Giants, insiders anticipate the competition to be resolved through live-action and multiple checkpoints before a decision is announced later in the summer.