The best swing path to the baseball is the one that allows a hitter to consistently meet the baseball square on, in the shortest amount of time.
Flying open with either the front foot, hips, shoulder or head will cause a hitter’s bat to drag through the zone. Flying open results in dropping the back shoulder, hands and bat head.
As stated earlier, flying open causes a hitter to drop/dip the back shoulder. Dropping with the back shoulder is the number one cause of a long swing. Once the bat head drops beyond the point of no return, there is little chance of catching up to a good fastball.
Tight grip causes tension in the forearms that results in a long swing with bat drag. There is nothing worse than watching a hitter tense up on the bat so much that he looks like Frankenstein when he swings. Loose grip equals a fast/tension free swing.
Besides the hands, the next worse spot to tense up is the arms and elbows. Tension in the arms will result in a long/slow swing. It is vital a hitter relieves all tension in the upper body while he presents in his batting stance. Refer to the image below.
Too much BP where the hitter tries to hit home runs every pitch will result in bat drag come game time. Some say a home run swing in BP is a bad swing, too many home run swings in BP will contribute to bad habits. It is essential that a hitter has a balanced hitting regime that includes a variety of hitting exercises. See below for good hitting drills to prevent bat drag.