Complimenting the counter trey with an RPO
Basics RPO Game – Coaches Insider
RPO football: History and future explained by coaches - Banner Society
RPO - Reading the Mike Linebacker
The RPO was born in high school and took over college. Now it's the NFL's favorite play. - The Washington Post
How RPO concepts work and why they're a headache to defend - The Athletic
Minnesota Football: What makes the Gophers' RPO so effective? - The Daily Gopher
RPO Concepts – Coaches Insider
Explaining RPOs, PROs, and PPOs – Concerning Sports