Abstract: An apparatus to measure leg drive of a pitcher as the pitcher as delivering a pitch is presented. The device comprises a pressure gauge integrated into a pitching rubber to provide a pressure profile of the leg drive utilized by the pitcher during delivery of a pitch. This device would be useful in evaluating pitchers, in determining if a pitcher has recovered from injury, to determine if a pitcher is tiring during a game, and to provide a general indication of the pitchers ability to throw hard. The device could also be used a training device, and used to coach pitchers into developing a strong leg drive. The device may further be used in conjunction with additional sensors to determine the turnover ratio of a pitcher, the time from when the front foot hits the front of the mound to when the back foot comes off the pitching rubber.