ホルヘ・ポサダ
During spring training in 2006, Yankees catcher Jorge Posada noticed the unique grip Mussina used for his changeup and promptly hit a home run off it during an intra-squad game. Posada alerted Mussina to the tip-off, and he adjusted the grip. This new changeup was difficult for batters to recognize and was considered a main reason for his success that season.