| Carlos Castillo | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 21 April 1975 |
| Birth Place: | Boston, Massachusetts, U.S. |
| Debutleague: | MLB |
| Debutdate: | April 2 |
| Debutyear: | 1997 |
| Debutteam: | Chicago White Sox |
| Finalleague: | MLB |
| Finaldate: | July 22 |
| Finalyear: | 2001 |
| Finalteam: | Boston Red Sox |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 10–7 |
| Stat2label: | Earned run average |
| Stat2value: | 5.04 |
| Stat3label: | Strikeouts |
| Stat3value: | 130 |
| Teams: | |
Carlos Castillo (born April 21, 1975) is a former pitcher in Major League Baseball who played for the Chicago White Sox and Boston Red Sox in part of four seasons spanning 1997–2001. Listed at 6inchesft2inchesin (ftin) and 240lb, he batted and threw right-handed.
In a four-season career, Castillo posted a 10–7 record with 130 strikeouts and a 5.04 ERA in 111 appearances, including six starts, 32 games finished, one save, and 210⅔ innings pitched.
After that, Castillo pitched in the Japanese and Taiwanese professional baseball leagues. In between, he played winter ball in the Dominican Republic, Puerto Rico and Venezuela.
Additionally, Castillo served as the pitching coach for the South Louisiana Pipeliners of the Continental Baseball League during its 2009 season.