Thornton throws a 91 mph sinker , an 84 mph slider , and an 84 mph changeup .
Zachary James Thornton ( born May 19 , 1988 ) is an American professional baseball pitcher who is currently a free agent .
free agent throws a 91 mph sinker , an 84 mph slider , and an 84 mph changeup .
Zachary James Thornton ( born May 19 , 1988 ) is an American professional baseball pitcher who is currently a free agent .