Related: Where the Patriots’ camp competitions stand after joint practices with the Panthers The New England Patriots added some youth to their defensive backfield this offseason. Houston’s Marcus Jones was selected in the third round of the draft; fellow cornerback Jack Jones out of Arizona State was added in the fourth; Texas safety Brenden Schooler was later brought aboard in undrafted free agency. The Joneses are locks to make the roster based on their draft statuses alone, while Schooler has had an encouraging summer serving primarily as a five-unit special teamer. Time will tell whether or not he will make…