Endorsements - Jim Presley
Jim Presley played in the majors for the better part of 8 seasons, and now is the former hitting coach for the Arizona Diamondbacks. In 1999, Dr. Sam Levatino made a hitting machine available to the Diamondbacks to use. The machine was very powerful and incredibly smooth. I was intrigued. Some players experimented with the machine on a low weight basis, about 40 lbs. The next winter, I spent a day with Dr. Levatino and witnessed a personal training session where Sam systematically coached a young hitter into a 100 lb. swing.

I went back to Phoenix and authorized our strength coach to move the upper limit to 70 lbs., from what was previously 40 lbs. A couple of players around Phoenix quickly grew accustomed to it in the off-season. They easily surpassed 70 lbs. and progressed to 100 lbs. They evolved into three workouts a week at 40 or 50 swings per workout.

The slow, methodical, incremental seasoning of the players' capacity to deliver 1600 oz. of power with flawless mechanics and perfect bathead trajectories had a profound effect on the performance of two veterans.

Their bat speed, and, therefore, slugging percentages increased dramatically 100 - 130 points. Swing tension decreased as a result of the development of excess capacity to deliver the 1600 oz. bat head from A - C. This decrease in swing tension increased batting averages about 35 points per player. Both players had career years.

The Swingbuilder is the greatest hitting aid I have ever seen for bat speed, exit velocity, and mechanics.

The Swingbuilder is an absolute necessity for any hitter who wants to be powerful, or for any person responsible for training groups of hitters. It builds more athletic hitters with balanced, tension-free power to all fields from all pitch locations.

In my opinion, every hitter at every level should have his swing trained and maintained by a Swingbuilder. Little leaguers need to learn to swing properly at an early age.

Sincerely,
Jim Presley

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