Playbooks

Singleback Y Trips stacks three receivers to one side with the tight end aligned as the inside trips member, leaving a single receiver isolated on the backside with a lone back next to the quarterback. That alignment is what separates it from balanced Singleback sets like Doubles or Wing sets: instead of splitting coverage evenly, you force the defense to declare strength. Most zone shells rotate a safety or drop a linebacker to the trips side, which leaves the backside X receiver on an island against whatever corner is left over. With 11 personnel, defenses typically stay in base or nickel, so the tight end inside the trips gets to work against a linebacker or slot defender rather than a true cover man.
The play list is unusually deep for a single set, which is what makes Y Trips a full-package formation rather than a situational look. You get quick game and screens (Bubble Screen, WR Screen, HB Slip Screen, Slot Out, Stick), flood and levels concepts off the trips side (Levels Switch, Slot Drive, Y Shallow Cross, Mesh, Double China, Curls Combo), and vertical shot plays (Four Verticals, Sluggo Seam, Y-Seam Curl, PA Zone Shot, PA Draw Shot, PA Corner Post). The alert plays are the real weapon here: HB Smash Alert X Smoke, HB Stretch Alert X Lookie, and HB Zone Wk Alert Bubble let you check into a free throw on the isolated side without burning a hot route, so you can run the ball or take the built in RPO answer based on the pre-snap box count.
The run game is legitimate too. HB Stretch, Inside Zone, HB Counter, HB Power O, HB Draw, HB Dive, and 0 1 Trap all live here, and because three receivers pull defenders to one side you are usually running into a lighter box. Pair that with play action off the same run looks (PA Power O, PA Ctr Waggle, PA Read, PA Cross Up, PA Stretch, PA WR In) and you get a formation where every snap looks identical pre-snap. The Gadget and SLWR tags mean you can also motion the slot receiver or use jet action (Jet 6 Soar) to stress the edge defender and reveal man coverage before the snap.
Read the flat defender over the trips side pre snap. If he is inside the numbers and playing off, Bubble Screen or the alert bubble is free yardage; if he presses the stack, go to Levels Switch or Slot Drive underneath.
Use the SLWR and Gadget motion tags to shift the slot across the formation and identify man versus zone before committing, then check into Mesh or Y Shallow Cross against man and Curls Combo or Double China against zone.
On third and medium, Stick and Slot Out give you quick timing throws against nickel, while Y Trail and Y-Seam Curl attack the hole between the hook defender and the safety.
Establish HB Stretch and Inside Zone early against light boxes, then run PA Ctr Waggle, PA Read, and PA Draw Shot off the exact same look to catch a user linebacker crashing downhill.
Hot route the isolated backside receiver to a fade or slant based on corner leverage. That single side matchup is your safety valve when the trips side gets flooded by a user defender.