As soon as he runs off the mark, anyone can tackle him from the side. If we back off and the player runs straight, non one can tackle him, ump can't call play on until he cross the mark.Or the player runs around the static man on the mark and runs 20m and kicks it.
I don't think it's an issue.
I'm going to keep watching it each week but there was a lot of clean deliveries from us backing off.