This series is a work-in-progress glossary of football concepts we tend to talk about in these pages. Previously: Offensive concepts: RPOs, high-low, snag, mesh, covered/ineligible receivers, Duo, zone vs gap blocking, zone stretch, split zone, pin and pull, inverted veer, reach block, kickout block, wham block, Y banana play, TRAIN, the run & shoot Defensive concepts: The 3-3-5, Contain & lane integrity, force player, hybrid space player, no YOU’RE a 3-4!, scrape exchange, Tampa 2, Saban-style pattern-matching, match quarters, Dantonio’s quarters, Don Brown’s 4-DL packages and 3-DL packages, Bear Special Teams: Spread punt vs NFL-style So counter trey and its counter, BASH, are a pair of offensive concepts we're going to see more of, possibly from and certainly against Michigan. While things like it were part of the Single Wing offenses of the early 20th century, Tom Osborne's Nebraska teams really made Counter Trey a staple of power running. Michigan ran a bun