Help us figure out ... just what the heck that thing David Price is using

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It only makes sense that ballplayers have futuristic workout equipment. After all, if they can become Major League stars by using the same medicine balls and treadmills that are available at every neighborhood gym, then the only excuse that we aren't Major Leaguers is a total lack of talent and drive. 
Yeah, it's definitely the equipment. But this time, even Red Sox broadcaster Jerry Remy -- himself a former ballplayer -- didn't know what David Price was using during the Red Sox's 3-2 win over the Rays on Saturday night. 

So, help us out. What is this thing? 

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