Sometimes it is more mental than physical. One local college coach tells the players in camp to focus your eyes on the top half of the softball. Try to hit the top half of the softball.
Before going about changing the physical part of the swing, make sure it is not mental. Jumping immediately to changing the physical swing is a mistake. Especially if the pop ups are a new phenominan for an otherwise good hitter.
Another part of this is the speed of the pitching. As a player moves up in age, the pitchers are faster, and the ball does not drop as much. They will use a rise ball, if a batter keeps popping it up.
Before going about changing the physical part of the swing, make sure it is not mental. Jumping immediately to changing the physical swing is a mistake. Especially if the pop ups are a new phenominan for an otherwise good hitter.
Another part of this is the speed of the pitching. As a player moves up in age, the pitchers are faster, and the ball does not drop as much. They will use a rise ball, if a batter keeps popping it up.