Juan Marrero Roig (born 24 March 1968) is a Spanish retired footballer who played as a central defender, and is the current manager of UD Montijo.
After making his senior debut with the reserves, he joined Segunda División B side CD Olímpic de Xàtiva in 1988.
After being a regular starter for Olímpic, Marrero moved to fellow league team CP Mérida in 1990, and achieved promotion to Segunda División in the end of the season.
He made his debut in the category on 22 September 1991, coming on as a half-time substitute in a 1–1 home draw against Racing de Santander.
[1] Marrero began his career with Imperio de Mérida CP in 2000, achieving promotion to Tercera División in his first season in charge.