William Radhames Castro Checo
- Bats Right, Throws Right
- Height 5' 11", Weight 170 lb.
Bill Castro pitched ten years in the majors, primarily in relief. He had some excellent seasons, including 1978 when he had a 1.81 ERA, and 1979, when he had a 2.03 ERA. Most of his major league career was spent with the Milwaukee Brewers, where he was four years older than teammate Robin Yount and five years older than teammate Paul Molitor.
Since his playing career ended, pitcher Bill has held various positions in the Milwaukee Brewers organization. He was a scout from 1985-1987, and the minor league pitching coordinator in 1989-1991. In 1992, Castro was named a Brewers coach, staying on the job until 2009. He was mostly the club's bullpen coach, but spent part of 2002 as the team's pitching coach. He began the 2009 season as the Brewers' pitching coach but was fired on August 12th with the team's mound crew badly underperforming. He was replaced by AAA pitching coach Chris Bosio. In 2011, he replaced Rich Gale as pitching coach of the Nashville Sounds when Gale resigned in mid-year. In 2012, the Baltimore Orioles hired him to be their new bullpen coach.
After his retirement as a player, Castro told SABR researchers that he was actually one year and a half older than his listed birthday of December 13, 1953. Such fibbing on birth dates was quite common at the time; the fake age, usually to make the player appear younger than he was, is known as the player's baseball age.