2025 Screen Game Research and Development – Case 1: North Texas G/T Tunnel Screen
“If you have a receiver that can win against a high safety in the open field than more often than not, you will generate a big play.
– Sean Brophy, Pass Game Coordinator, University of North Texas
By Mike Kuchar
Senior Researcher/Co-Founder
X&O Labs
@MikeKKuchar
These days, the football offices in Denton Texas, are flooded with coaching visitors looking to find out all they can on the North Texas tunnel screen concept. They’ve seen the video and heard the clinics, but that’s not enough. They want to know exactly how the offensive staff has transformed this concept to continually generate explosives, including a 96-yard score earlier this season, which ranks among the highest single-play yardage producers in college football last season.
I was one of those coaches who were amazed by watching North Texas film on the concept this season. I thought they were among the best at running the scheme and I continually pursued pass game coordinator Sean Brophy to get him to clinic me on it and introduce it to our reader base. Graciously, Coach Brophy obliged and went into great detail on how he and his offensive staff teach the play.
How it Works:
There are two major distinctions that separate the G/T counter tunnel from traditional tunnel screens: one is the instant misdirection it provides to second-level defenders with pulls at the line of scrimmage. The other is the timing. These are fast screens, so the offensive line (Center, Guard, and Tackle) is able to get out right away without being held up at the line of scrimmage. And if your offensive menu consists of G/T counter run concepts, then it’s an easy additive to what you’re already doing. But even if you don’t major in gap schemes and you gave a speedy slot with the gall to catch the ball over the middle, this concept can easily be built into your system.
It’s one of those concepts that when it hits, it hits. It doesn’t need to be run more than three to four times a game. In fact, Coach Brophy told me that he’ll only carry it one way per week, and it has become more game plan specific. Most times, when you run it, you’re going to be short a hat against a safety unless it’s called away from rotation, strong or weak. But if you have a receiver that can win against a high safety in the open field- like North Texas did last season- then more often than not you can generate a big play.
“Flat and Fast:” Handling the Alley
At North Texas, the emphasis is on getting linemen out in space quickly. A major benefit of the G/T tunnel is that the backside of the concept (Center, Guard, and Tackle) is able to release immediately and get to their assignments. The teaching progression is taught as follows:
- Backside Guard– This is the force defender blocker and the first out in the screen. He’s taught to work “flat and fast” to kick out the force defender.
But oftentimes, the force defender gets pulled with the misdirection. So, if nothing shows in the alley, he’s taught to “retrace” up the field and not get vertical immediately.
“We don’t want to get hung up at the line of scrimmage,” Coach Brophy told me. “We have to be able to identify when the alley disappears and be able to get up field and block a safety. There is some craftiness and nuance. Have to get the thing started.”
One of the more innovative things that the offensive staff at North Texas does is build in tags to help the offensive line recognize and block their assignments. Tags are used to identify who the alley defender is based on the force structure. This helps the alley blocker understand who he is working to. On each play, the offensive line is given the motion call, force call, and screen call. Once that is communicated, they are expected to go full speed and get their assignments blocked.
Editor’s Note: In this report, Mike reveals the details of how this works, best practices, and identifies who else is using it. And, as always, Mike includes a lot of video and diagrams, as well as shares where to find more game film in X&O Labs’ Film Room. Log in below to unlock the full report (and if you’re not a member, click the ‘Join’ button in the upper right-hand corner of this page).