scholarships and who has sat in on countless training sessions with the likes of Kurt Warner, Ty Detmer, Jim Zorn, Sage Rosenfels, Chris Miller, Sean Salisbury, Brandon Doman, Riley Jensen and tons of others.
Throwing off the back foot used to be the biggest no no a qb could do. The wisdom was that it caused you to throw a weak ball that is intercepted. QBs were taught to transfer weight down the line that they are throwing onto your front foot, and then rise up and throw over the top down the line.
Several years ago, a man by the name of Tom House, who most of you have probably heard of, came into the QB world from the baseball world. He was the most renowned expert on baseball throwing mechanics. He ended up founding 3QB with our own John Beck. They have become arguably the leading expert in QB play and mechanics.
They have found that QB throwing isn't as different from baseball as common wisdom was dictating, and that more power is achieved through rotational throwing vs. linear. And guess what? You can't get proper rotation when your weight is on your front foot.
Everyone is teaching rotational throwing now... some have even gone further and teach what looks almost like a side arm release. I'm not in love with that, but there is no doubt that rotational throwing produces greater velocity and arm strength.
The other aspect of it is to disassociate your top half from your bottom. This means your legs have weight mostly on the back foot (now that doesn't mean leaning back or falling back which generally what people think of when you saying throwing off the back foot), and planted firmly in the ground. While corkscrewing your torso to cock back like your GI Joe dolls when you were a kid. Then the throw is unwinding the rubber band and extending your arm fully with reach, then flicking the ball like always is done.
So in other words... If you're not throwing off your back foot, you're doing it wrong.