Kerwin Joseph Danley (born May 25, 1961) is an American umpire in Major League Baseball who has worked in the National League (NL) from 1992 to 1999 and throughout both leagues since 2000. He was promoted to crew chief for the 2020 season, becoming the first full time African-American crew chief. Danley has umpired in the 2008 and 2018 World Series and the 2007 and 2016 Major League Baseball All-Star Games. He is married to Marisa Danley.