I hope Brailey is OK, but it must be extremely difficult to came back from three ACL operations as well as an Achilles operation. It sounds like the hamstring strain could be related to the ACL operation as a hamstring graft is a common way of treating the injury, however it can lead to a slightly weaker hamstring. I wouldn't bring him back unless he's 100%. I would give Riley Jones the job, he looks keen and could turn out to be another Crossland.