2016 NASCAR Xfinity SeriesPrevious2015Next2017Champions | Seasons The 2016 NASCAR Xfinity Series was the 35th season of the Xfinity Series, a stock car racing series sanctioned by the NASCAR in the United States. The season started at Daytona International Speedway on February 20 and ended at Homestead-Miami Speedway on November 19. Daniel Suárez of Joe Gibbs Racing won the championship, becoming the first non-American to win a title in NASCAR's top 3 divisions.