Esteban Manuel Antonio Castillo Cabrera (born April 1, 1957) is a Dominican former Major League Baseball third baseman. He batted and threw right-handed, and was 5 foot 9. Castillo played 3 seasons in Major League Baseball, with the Kansas City Royals in 1980 and the Seattle Mariners in 1982 and 1983. He played in 236 games in his career, with a batting average of .242 with 174 hits in 719 at-bats. He had 3 stolen bases, 3 home runs, 73 RBI and 63 runs.
Castillo had his best season in 1982 with the Mariners when he had 130 hits, had an average of .257, and all 3 of his career home runs.
As of 2018, Castillo is a coach in the Tampa Bay Rays farm system.