Roy Kent line "So sometimes the f* Diamond Dogs is just chatting about s*, and no one has to f* solve anything and nothing f* changes?" is word by word (minus the curses) what Ted says to Rebecca in the "girl chat" bit of Goodbye Earl (2021).
At the pub Coach Beard expresses his concern to Ted that if he holds everything in that's happening to him his mustache will "pop off" to which Ted muses he'll then be mistaken for "that fella from The Hangover (2009)" Beard infers Bradley Cooper to which Ted responds with, "You're too good to me." The joke behind this whole conversation isn't that Beard thinks Ted looks like Bradley Cooper, but that in real life Jason Sudeikis is frequently mistaken for Ed Helms and has on talk shows pleaded with people to stop confusing him for the other. Side note: Jason Sudeikis and Ed Helms appeared together in "We're the Millers" (2013).
The title of this episode refers to Jonathan Wilson's popular book "Inverting the Pyramid: The History of Football Tactics". Coach Beard is seen reading from the book in the pilot episode.
Jason Sudeikis' friend and former SNL colleague, Seth Meyers is a fan of West Ham United, the club that Rupert, in real life.
Ted says unlike Lieutenant Kaffee, he can handle the truth. In "A Few Good Men" (1992), Jack Nicholson plays Colonel Jessup who delivers the line, "You can't handle the truth" to Lt. Kaffee played by Tom Cruise.