Bears have question mark in a big spot A left offensive tackle with a bad attitude can get his quarterback maimed, if not killed

The trim wide receivers dart around like flies.

The thick-necked linebackers zip back and forth like pit bulls.

Even the trio of quarterbacks, in their orange hands-off jerseys,sprint hither and yon, throwing completion after completion in theseshoulder-pad-free drills at minicamp.

Then there are the offensive linemen.

The big fellas mirror the charges of their near-opposites --thedefensive linemen.

But mostly they just try to stay put.

They put their hands out, hunker down, and try not to let anybodypast.

Football as masonry.

But how important are the human roadblocks and their minimalmovements?

Ask any NFL quarterback, …