Antonio José Raíllo Arenas (born 8 October 1991) is a Spanish professional footballer who plays as a central defender for and captains the La Liga club RCD Mallorca.
Born in Córdoba, Andalusia, Raíllo began his senior career in the lower tiers of Spanish football, representing clubs such as CD Pozoblanco and Córdoba CF B. In 2013, he joined RCD Espanyol, initially playing for their reserve team in the Segunda División B. He made his debut for the first team in La Liga in August 2015. Following a brief loan spell with SD Ponferradina in early 2016, Raíllo signed a permanent contract with RCD Mallorca in June 2016.
During his tenure at RCD Mallorca, Raíllo became a foundational member of the squad, experiencing both relegation to the third tier and subsequent promotions back to the top flight. He played a significant role in the club's consecutive promotions from Segunda División B to La Liga between 2017 and 2019. Known for his leadership, physical presence, and aerial capability, he was eventually appointed club captain. Raíllo has made over 200 competitive appearances for the Balearic club, establishing himself as one of the team's longest-serving players in the modern era.