SANTA CLARA — The name “Shanahan” in the NFL means the outside zone blocking scheme.

It’s the family business that 49ers head coach Kyle Shanahan inherited from his dad, Super Bowl-winning coach Mike Shanahan. It’s that synchronized ballet of an offensive line firing off the ball in unison, moving left or right, attacking space first and defenders second.

This scheme is the reason roughly half the coaches in this league have jobs.

And it’s supposed to be art.

But for the first six weeks of this 49ers’ season, that art has looked more like a toddler’s finger-painting project.

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It was all terribly unb

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