Mtn Y Screen

Read the flow of the linebackers immediately after the snap, if they crash hard upfield or blitz off the edge the screen lane opens instantly Identify two high safeties pre snap, against a two deep shell the verticals occupy the safeties and the screen has room underneath Watch for a user controlled defender sitting in a shallow zone or spying the backfield, that lurk defender can jump the screen route and blow it up Check corner alignment on the outside receivers, press man coverage on the verticals often means the underneath defenders are more likely to bite on the vertical action Look for a blitz call from the middle linebacker position since a delayed screen with linemen releasing outside can get exposed by an unblocked interior rusher who reads the play immediately