Chase for the Sprint Cup has been generally panned since its inception, as many drivers and owners have criticized the declining importance of the first 26 races, as well as very little change in schedule from year to year. Mike Fisher, the director of the NASCAR Research and Development Center, has been one of the more vocal critics of the system, saying that "Due to NASCAR having the same competitors on the track week in, week out, a champion emerges. In stick-and-ball sports, every team has a different schedule, so head-to-head series are necessary to determine a champion. That does not apply to auto racing." NASCAR extended the Chase format to its other two national touring series, the Xfinity Series and Gander Outdoors Truck Series (then the Camping World Truck Series), beginning in 2016. The formats used in the two lower series are broadly similar to the format used in the Cup Series, but have some significant differences: The Xfinity and Truck Series Chases are held over three rounds, instead of four in the Cup Series. Each of the first two rounds of the Xfinity and Truck Series Chases consists of two races (compared to three in the first three rounds of the Cup Series Chase). The Xfinity Series Dash 4 Cash, consisting of four short events with the winners receiving cash prizes, has been incorporated into that series' Chase. A driver who wins two Dash 4 Cash events is considered as having one regular race win, which essentially qualifies the driver for the Chase even if he or she wins no other race during the season. However, there is no points bonus for Dash 4 Cash wins. Instead of the 16 drivers who qualify in the Cup Series, 12 drivers qualify in the Xfinity Series and 8 in the Truck Series. Four drivers are eliminated at the end of each of the first two rounds of the Xfinity Series Chase, as in the Cup Series. The Truck Series Chase eliminates only two drivers at the end of its first two rounds. All formats end with four drivers eligible to win the season title entering the season's last race. The rounds of the Chase now have a standard name across all series. The rounds leading up to the final race are now officially called "Round of X", where "X" is the number of drivers eligible for the season title. The