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Purpose: The aim of this article was to investigate the role that proprioception of the upper limb plays in making basketball free throws., Method: We designed an experiment to directly correlate the performance of basketball players in a free-throw task and an elbow- and wrist-joint position sense task., Results: We found a moderately high correlation between the free-throw success rate and wrist-joint position sense and a moderate correlation between the free-throw success rate and elbow-joint position sense. In both cases, the most successful shooters also had the best proprioceptive results., Conclusions: The results indicate that free-throw success is, at least partly, determined by players' ability to sense the position of the distal joints of their throwing upper limb. From a motor-control point of view, this suggests that basketball players may organize the compensatory behavior between the joints of their free-throwing arm on the basis of proprioception. From a practical point of view, it points toward new training techniques to enhance free-throwing efficiency.