QB- Vectoring or Dynamic Geometry

Posted January 4th, 2011 in Blog by jwestenhaver

Vectoring or Dynamic Geometry

vector is defined in the second edition of the american heritage dictionary as follows: “A quanity completely specified by a magnitude and a direction”. i am more familiar with this term as it applies to the interception of one aircraft with another. for the purpose of this discussion, i will apply speed for the term magnitude as that is the contex for which it is intended.

dynanic geometry is a term of my own invention. a descriptive term depicting two objects the receiver and the ball. these two objects have the goal of arriving at the same place at the same time. vectoring is the process required to achieve this goal and dynamic geometry is the visualization of this process.

think back to your high school plane geometry class where we were give three points of a triangle [a,b and c] and were asked to figure out the distance from point “a” to point “c”. now visualize point “b” moving on a plane from its’ origional point to a moving point “c”, with point “a” being stationary or moving. this moving of points is the dynamic gemetric picture that we need to consider.

let me put this is simpler terms. have you ever gone bird hunting? if so here is the sequence of events. the hunter is standing at point “a”. he spots the bird at point “b” but the bird is moving to a point “c”. the hunter aims his gun at where he thinks the bulett and the bird will intersect, point “c”. he must consider the speed of the bird, the speed of the bulett, and the point at which to aim. if all of his calculations are correct he will have his prey and the hunt will have been successful. for him to be the best hunter in the fields his calculations [speed 1, the bird; speed 2, the bulett; and the aiming point] must be consistently accurate. a mis-calculation of any one of these factors will result in a missed bird and the waste of a bulett.

the point of all of this:

as i observed the qbs at the recent nfl combine i witnessed most of the players throwing behind the out, the slant and the post routes and i began to wonder why. i knew that it wasn’t because of a lack of power or ball speed and in most cases was not due to the poor timing of the delivery. as i pondered this delema it became very clear to me.

there were two basic factors. one, a lack of understanding of “vectoring and dynamic geometry” and two, looking at the receiver [a false “c”] and not to the intersection point [the true “c”]. a failure to execute one or both of these will always result in a ball thrown behind the receiver.

poor vectoring is, mechanically speaking, caused by a failure to achieve proper front foot stepping which results in a failure to get the hiips “open” to the target. this coupled with an aborted “dominant arm” follow through produces the observed result. You see, when a hunter fires a shot at the bird, it is aimed at a point where the bird will fly through the barage. looking at the receiver and not to the intersection point contributes greatly to the above factors. THESE BRING up another point, the importance of the qb knowing the speed, cut point control and burst, and the uniquness of each receiver.

as an aside, most of the passes were also high on their arrival at the target and this is due to a low elbow position. with a low elbow position it is virtually impossible to throw a pass on a desending trajectory.

i would debate anyone anywhere who maintains that passeng mechanics are not important and that they can’t or should not be taught and emphasized.

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