Sin Piedad (2017) (Spanish for "No Mercy") was a major professional wrestling event scripted and produced by the Mexican Lucha Libre promotion Consejo Mundial de Lucha Libre (CMLL), which took place on January 1, 2017 in Arena México, Mexico City, Mexico. The 2017 Sin Piedad was the 13th event under that name that CMLL has promoted since the first one was held in 2000, the second one to be held on New Year's Day.