Their favorite run play is the stretch play, also known as the outside zone. They are also extremely effective at play action passing off the stretch action, where Peyton Manning makes those great run fakes that the announcers go crazy about. (From what I can tell their favorite routes from their play action from the stretch are post/dig, double posts, and post/corner/post combinations).
Anyway, they run their stretch a bit differently, since instead having everyone step and reach playside and getting movement that way, they run a kind of "pin and pull" scheme, which at the college level the Minnesota Golden Gophers also run with great success.
The diagrams/explanation is not directly from the Colts but it is what they do.
Onward:
The Indianapolis Colts and The "Pin and Pull" Stretch Play
Intro
[In this terminology, the play is called "flex."]
FLEX is a strong side play.
The aiming point for the Single Back is 1 yard outside of the TE.
If the “A” is play side he is responsible for blocking the force (strong safety) defender.
If the “A” is aligned on the backside of the play he must start on an inside path and block the most dangerous pursuing defender
After the exchange the QB will set-up like he does on PISTOL protection
If the “A” is in motion prior to the snap and we want him to block the force defender on the play side we will call FLEX BOSS.
BOSS means Back On Strong Safety
Against "Under"
If the Center can reach the Nose he will make a “YOU” call to the Strong Guard telling the Strong Guard to pull and block the M(ike) linebacker.
The Strong Tackle and Tight End will “TEX”. The TE must block DOWN and not allow any penetration. The Strong Tackle needs to pull and RUN TO REACH the S(am) linebacker.
Against "Loaded"
If the Center cannot reach the Nose he will make a “ME” call to the strong guard telling him to block the Nose and the Center will pull to block the M(ike).
The Strong Guard must block DOWN and not allow the Nose to penetrate.
The Strong Tackle and the TE will “TEX," as described above.
Against "Adjusted 4-3"
The Tight End is responsible for blocking the DE wherever he aligns.
The Strong Tackle is responsible for pulling and blocking the SLB’er wherever he aligns. Stay square and see the Sam linebacker during the pull.
The Center is responsible for blocking the Mike linebacker. The Quick Guard has a difficult block and must be prepared to SCRAMBLE block the Nose.
Against "4-3 Wide"
The Tight End is responsible for blocking the DE wherever he aligns. STEP-CROSS-STEP to reach the DE.
The Strong Tackle is responsible for pulling and blocking the Sam linebacker. Stay square and see the Sam linebacker during the pull - you could go around OR inside of the TE’s block.
The Center is responsible for blocking the Mike linebacker & the Quick Guard blocks the Nose.
