NORMAN – Gavin Sawchuk has enjoyed a new experience this month: a fall camp finally healthy and without limitations. The redshirt sophomore running back is entering his third year at Oklahoma, but this preseason marks his first fully healthy stretch of preseason practices after being hampered by hamstring issues during this part of the calendar the last two seasons. To say it has been refreshing for the 5-foot-11, 200-pound running back would be an understatement.