Sin Piedad (2010) (Spanish for "No Mercy") was a professional wrestling major show produced by Consejo Mundial de Lucha Libre (CMLL) that took place on December 3, 2010 in CMLL's home arena Arena México in Mexico City, Mexico. The 2010 Sin Piedad was the eight event under that name that CMLL promoted as their last major show of the year, always held in December. The main event of the evening featured a Lucha de Apuestas, hair vs. hair match, that was a continuation of the "CMLL vs. Los Invasores" storyline as CMLL representative Rey Bucanero defeated Invasore Co-Captain Mr. Águila, forcing him to have his hair shaved off after the match. The show also featured an additional Lucha de Apuestas, this time with both participants' masks on the line. The match saw Mini-Estrella wrestler Eléctrico defeat Pequeño Black Warrior, forcing him to unmask after the match. The show featured four additional matches, three Best two out of three falls Six-man tag team matches and an Eight-man tag team match.
