Claudio Castagnoli is a Swiss professional wrestler signed to All Elite Wrestling (AEW) and Consejo Mundial de Lucha Libre (CMLL). He is a member of the Death Riders faction. Castagnoli is also known for his work in Ring of Honor (ROH) through the 2000s and early 2020s, and for his tenure with WWE between 2011 and 2022, where he performed under the ring names Cesaro and Antonio Cesaro.