The Trips formation creates a dilemma for any defensive coordinator and the problems usually start in the box. The major issue with any 3×1 formation is how a defense chooses to defend the #3 receiver. Regardless if a defense runs an Under Front or Under, the Mike either has to cover down to the #3 WR or the defense has to spin a safety to gain a cover down. If the defense uses the Mike as a cover down, it loses a man in the box and makes the Mike a “fold” or conflict player. To alleviate the issue some defenses drop the boundary safety into the box, but that leaves a defense susceptible to the back side post. Below is an example of Nick Saban’s “Rip/Liz.” The sinking backside safety allows the frontside ILB to vacate and cover down to #3.
A “fold” or conflict player is susceptible to the Spread’s deadly weapon, the RPO (run-pass option). The run-pass conflict created by Mike’s width and assignment can cause him to hesitate. Play a team like Baylor under Briles, who spreads their Trips formation past the hash, and the Mike will struggle to get to the #3 and fold into the box. In theory, the Mike is always wrong. That’s pretty depressing news for a DC. Below is an example of the Over Front versus a 3×1 formation with no adjustment from the defense.
If a DC wants to keep a 6-man box and put the 3 technique (DT) to the Trips it creates a problem for the Mike who has to plug the strong-side “A” while reaching #3 in pass. That’s not an easy thing to do for even the most elite ILBs. The answer for most coaches is to kick the coverage (bring the backside safety across), or spin to some kind of Cover 3 (illustrated above in Saban’s Rip/Liz scheme). In order to make it hard on the offense, a DC must change-up the coverage or move the gaps. It is important to have a base coverage. One that protects you from the most harm. To stay ahead of the offense, a defense must be multiple in its looks, adding pressures, blitzes, and a change-up in coverage if need be. Part 2 of “How do you play Trips?” will explain the multiple coverage pieces to Trips Open.