While [tag]coaching football[/tag] I like staying in the coverage that we called if the offense lines up in some sort of one back formation.   Trips especially confuses Safeties for some odd reason.   I came up with this   half line cover 3 [tag]football drill[/tag] for the safety and the trips side corner.

You align your corner and safety however you want to align them for your cover 3 and then you just rep and rep and rep plays to that side until the safety and corner can successfully jump the correct route.

I number the receivers from the outside in.   So in trips the X is 1, the slot is 2, and the trips back is 3.   From the corner’s perspective he keys through number 1 to number 2.   If number 1 disappears or slants/posts inside then he looks for number 2 coming at him.   If 1 and 2 both disappear inside he then looks for number 3 coming at him.

The safety has the same progression except he starts with number 3 and works his way out.   After my safeties and corners have repped this [tag]football[/tag] drill enough, they do not get beat on wheels up the sideline and the corner will have success robbing or jumping a route and making a pick for you or a huge hit on number 1 or 2 slanting/posting at him.

These same rules are used if the offense is in a slot with a weak offset I formation.