The Brief The Minnesota Vikings are practicing in TCO Stadium Sunday night for their 10th workout of training camp. Vikings coach Kevin O'Connell is not yet ready to name a starting quarterback between Kyler Murray and J.J. McCarthy. The Minnesota Vikings are holding their 10th practice of training camp on Sunday, and it’s the team’s annual night practice at TCO Stadium. Kevin O’Connell not ready to name starting QBWhat we know:Vikings coach Kevin O’Connell said before Sunday night’s practice in Eagan that the competition between Kyler Murray and J.J. McCarthy for the starting quarterback job is ongoing. What's next:The Vikings practice Tuesday-Thursday next week before opening the preseason at the New York Giants on Saturday, Aug. 15.