Biggest Retirements of 2012

Wood, 34, broke onto the scene in Chicago in 1998 when he posted a 13-6 record with a 3.40 ERA and 233 strikeouts in just 166.2 innings of work. He won the Rookie of the Year that season, but also gained notoriety for striking out 20 batters in one game. Wood did not pitch in 1999 due to an arm injury, but bounced back from 2001-2003 as a major force in a Cubs rotation that featured him and fellow young hurler Mark Prior. During that three-year span, Wood collected 12 or more wins, posted an ERA below 3.66, and struck out at least 217 batters in each season. A two-time all-star, the hurler's arm injuries later returned and he was forced to become a relief pitcher for the remainder of his career.