On Mondays during the off-season, pitchers at Driveline typically throw an extended bullpen session. Boddy decided to split the pitchers into two groups—one would use the Marc Pro for 15 minutes after their session, the other would not. To measure the effect that the Marc Pro had on recovery, Boddy tested the pitchers' grip strength and internal rotation power—two markers linked to worse command and a higher chance of injury. When he compiled the data, the results were clear: the pitchers who had used the Marc Pro recovered faster. "The differences were significant. Grip strength was restored much quicker in athletes that used the Marc Pro for at least 15 minutes in a local area, and internal rotation power improved as well," Boddy says.