Only one player may guard the thrower at any one time; that player is the “marker.”
The marker may not straddle the pivot foot of the thrower.
There must be at least one disc's diameter between the bodies of the thrower and the marker at all times.
The marker cannot position his/her arms in such a manner as to restrict the thrower from pivoting.
Stall count: The period of time within which a thrower must release a throw.