I got this idea from an X follower, not sure if he's on here. Also, I think I found out what I want to do in retirement: A book on the evolution of the West Coast Offense.

There's nothing Shanahan can draw up that’s new & exciting. Indeed, he could decide he wants to come out in a wishbone formation this weekend, just to see what kind of chaos that might bring. And, frankly, I’d be all for it. I’d love to see the content creators and film folks reaction to it.

In 2004, Mike Shanahan - now head coach of the Broncos - introduced 300 Jet Lion Drag slant. It's the same play that Kyle has today in his book & the same play that he called last week to get the 49ers some breathing room late in the game - which I can't post here because it's a video clip.

Sprint Right Option, the same way Walsh drew it up, was also in Gruden's book. Shanahan also has Sprint Right Option, but like Gruden, just calls it Q8.

In his book, he introduced the 'lion' concept - the mirrored slant routes - on plays like 322 Scat Y Stick Lion. He also had 300 Jet Lion - mirrored slant routes on both sides of the formation,

When Gruden became the head coach of the Oakland Raiders in 1998, he introduced his version of the West Coast Offense to the Silver and Black.

Also included in the 1994 book was Mike's Far Double Wing Right X Right 62 (63) Z Drive, which is nearly identical to Kyle's 'arches' concept - called twice during the Week 5 win. The one below is what Bourne converted into a 35-yd gain.

In 1994, then 49ers offensive coordinator Mike Shanahan introduced the 'dragon' terminology. Rather than a solo slant, the play evolved to two dragon concepts on either side of the formation. The elder Shanahan's book also had keeper plays, which look nearly the same as Kyle's designs today.

Mike Holmgren’s 1991 49er playbook kept Walsh’s idea, but Holmgren called it Red Right Y Motion Pass 331 Drag Slant. The dragon concept remained, it just sounded a bit different.

Former head coach Jon Gruden was an offensive quality control coach under Holmgren, so keep that in mind as we evolve.

For whatever it’s worth, Walsh also had a Statue of Liberty play in his 1985 book, but I’m unclear if he actually called it.

The play remained in the 1985 playbook. The ‘dragon’ combination is still there on the right. The '22/23' still exists in today's terminology. It indicates the backs are splitting.

Here's a similar look in Bill Walsh's 1982 playbook as 'Red Right Pass 331 'X' Slant'.

Vince Lombardi's 1966 Green Bay Packers offense ran a dragon combination, which he called Slant Pass or 36 Pass. You can see the 'dragon' concept - a slant route pairs with a drag route - on the left.

I'm unclear how or why I cannot post anything over 100MB in size. We might as well run this site on an old AOL platform and a dial-up modem. I'll try and find a solution.

3Q: 1 & 10 at the SF36 (6:32) Jones to Pearsall for 18yds on Wide Right Clamp F Short P14 Jab Z Rider F Shallow. The shallow cross was a great add to Rider - held up the LBs, opening the throwing window for Jones to hit Pearsall.

2 & 1 at the SF41 (8:10) Jones to Pearsall for 18yds. Super clever play: keeper action with a half roll; Yankee concept downfield - Valdes-Scantling on a far corner and Pearsall on a dover route. The far corner pulls the safety, opening up the field for Pearsall.

No dice again on the clip.

2Q: 1 & 10 at the SF32 (8:40) Jones to Valdes-Scantling for 9yds. I have this as Both Curl Y Over. Full clip won't post.

1Q: 3 & 4 at the ARI47 (7:04) Jones INC to Pearsall. Good call, poor effort from McKivitz. I think would have hit with some better work up front. Pearsall on a corner, Bourne on Basic, Y ran a C.O, Moore on stick-china and the H ran a choice. 3 Jet protection.

And nope, file size is too large.