Abstract: A pitching and batting conditioning device which is characterized in a first preferred embodiment by single and multiple drum conditioning devices having a drum spool for receiving a weight line attached to a weight and one or more drums of the same or different diameters for receiving a conditioning line or lines attached to a baseball bat or ball. Conditioning of the arm or arms and upper body is achieved by grasping the bat or ball and swinging the bat or simulating throwing the ball against the resistance of the weight. In another embodiment a multiple spring conditioning device also includes a conditioning line attached to a bat or ball and an adjustable feature for engaging springs of varying tension for application to the conditioning line. In a third embodiment a torsion spring is mounted in a housing with an adjustable torsional feature and includes a drum, upon which is wound a conditioning line attached to a bat or ball.