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. In the main event of the show Máximo Sexy defeated lucha libre legend Máscara Año 2000 in a Lucha de Apuestas, or "bet match", and as a result Máscara Año 2000 was shaved bald after the match. The show featured three best two-out-of-three falls six-man "Lucha Libre rules" tag team matches and a tag team match for a total of five matches. Production Background The Mexican professional wrestling company Consejo Mundial de Lucha Libre (Spanish for "World Wrestling Council"; CMLL) has held a number of major shows over the years using the moniker Sin Piedad ("No Pity" or "No Mercy") for a major show intermittently since 2000. The name has primarily been used for CMLL's "end of the year" show in December with one exception when the show was held in August. CMLL has on occasion used a different name for the end-of-year show, but Sin Piedad is the most commonly used name. All Sin Piedad shows have been held in Arena México in Mexico City, Mexico which is CMLL's main venue, its home base and main venue. The 2017 Sin Piedad was the second time such a show under that name was held on New Year's Day. Starting in 2011 through 2014 CMLL has been promoting a New Year's Day show with bigger, more prominent and promoted matches as part of the show although they did not specifically promote the shows under a special name, they were simply a special version of their weekly Saturday, Sunday, Tuesday and Wednesday shows that they hold in Arena Mexico on a regular basis. Starting in 2011 CMLL added at least one high-profile match to their shows, slowly building them into a special event. in 2011 the show featured the annual Reyes del Aire ("Kings of the Air") tournament, won by Ángel de Oro. In 2012 the January 1 show saw Hombre Bala Jr. and Super Halcón Jr. defeated the team known as Los Rayos Tapatío in a Luchas