Chris works with hitters of all ages and his highest level client is Andres Torres of the San Francisco Giants. Don Mattingly's Swing I do not believe that cutting down Derek Jeter's stride is going to do much to fix the problem. What's unusual is that I have never seen a hitter manage to stick in the major leagues with this flaw. Derek Jeter's Back Arm Action. In the clip above, notice how Albert Pujols' back elbow goes to his back hip and then stays there.
Derek Jeter's Back Arm Action.
Derek Jeter's swing also isn't getting closer to Paul Molitor's, which was the stated goal. In the world of golf, this is known as hitting from the top and it can cause multiple problems. He didn't used to do that. I think the reason Derek Jeter has been able to be successful is that he is remarkably quick and has a great eye and great reflexes. They can kill the ball at AAA but are pretty much universally unable to hit the quality breaking and off-speed stuff that you see in the major leagues.