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Aroldis Chapman
It’s been almost too easy for this Cuban closer to throw flames. While in Cincinnati, Chapman regularly sent the speed gun past the 100 mph mark, taking the cake for fastest fastball in the game. But the question remains: can he do it on the game’s biggest stage? In the last days of 2015, Chapman was traded to the Yankees for several prospects. Now he has to take the spot once filled by a guy named Mariano Rivera.