Everystros XXXVI
506. Roberto Hernández is a six-foot-four right-handed pitcher from Santo Domingo, DR. Born on August 30, 1980, he was formerly also known as Fausto Carmona. He reached the majors for the first time in 2006, then in his first two seasons was 1-10 and 19-8 respectively. The 20-win differential may be the greatest one-season swing for a pitcher ever. It’s the biggest I can remember seeing anyway.
Hernández pitched for seven seasons with the Tribe (53-69, 4.64, 949 IP, 2010 AL All-Star Team). He later played with the Tampa Bay Rays (6-13, 4.