In our area, the single largest district. which has 18 of the 25 schools we service, has a policy that bars teams from off-season full-contact scrimmages. This makes the 7-on-7 passing leagues the only opportunities we have to take the field and work on our pass coverage. We work them for free, since they're not school sanctioned. We use 2- or 3-man mechanics. Coaches will time the QB and will declare a sack if it exceeds the time limit.