Picks:
Initiating contact with a disc in a player's possession is a foul. Sustained contact with, and control of, a non-spinning disc is required to establish possession (3.J). A player may not call a strip if they had only momentary contact with or lacked control of the disc prior to an opponent contacting the disc.
A pick can be called only by the obstructed player and must be announced by loudly calling "pick" immediately after it occurs.