A grasping mechanism for an agricultural bale wagon has a fixed grasping arm and a movable grasping arm. The movable grasping arm is translatable toward and away from the fixed grasping arm. The movable grasping arm can be rotated to define varying angular relationships between the fixed grasping arm and the movable grasping arm. Rotation and translation of the movable grasping arm are effected by an actuator. A resilient bumper between the fixed grasping arm and movable grasping arm is adjustable automatically to span the adjusted width between the fixed grasping arm and movable grasping arm.