There’s not a red card violation where you only jump routes if you’re playing man defense as opposed to zone.
Zone merely leads to man defense. At some point a man enters your zone and if rotations and assignments are locked in and the ball is in the air, it doesn’t matter if you’ve followed the man the whole time during entire snap or whether a receiver entered your zone, you’ve got to cover that man.
Zone leads to a man-on-man situations unless the play is extended and the receiver leaves your zone.
If you don’t cover a guy in your zone, you have a hot potato situation: you cover him! No you!
Sure. Are there times when you have two receivers in your zone at the same time? But do you leave them both unmanned-up? That’s the cushion of death on steroids. No coaches teach that.
So, you can jump routes from zone or from man coverage. I’ve seen it both ways as has everyone on this board.
We Not Me