All offensive players are prohibited from blocking defensive players past the line of scrimmage during a pass play until the pass is caught.
In a pick play, two receivers run paths that cross each other. In doing so, one receiver “accidentally” blocks the person defending the other receiver. This leaves the other receiver wide open to catch a pass.
“All offensive players are prohibited from blocking defensive players past the line of scrimmage during a pass play until the pass is caught.”
Caught or tipped.