NASCAR's 7 most controversial rule changes in history ft. Restrictor Plate debate

NASCAR's rule book has seen several drastic changes over the years, all aimed at enhancing safety, improving competition, and adapting to evolving technologies. While many of these changes have been welcomed by fans, teams, and drivers, a few continue to spark intense debates.

The premier stock car racing series has evolved drastically over the last two decades, with iterations of the playoff format being some of the most fundamental changes in the sport's history. These rule changes continue to inspire mixed feelings among fans.

Apart from the playoff format, many sporting regulations continue to be the subject of debates. Take a look at seven of NASCAR's most controversial rule changes and the lasting impact they've had on the sport.

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NASCAR's 7 Most Controversial Rule Changes

#7 Double yellow line

The double yellow line rule was introduced in 2001 at restrictor plate races. It states that drivers must not drop below the yellow line to gain position. If the rule is broken, race officials have the authority to penalize the driver.

This simple rule has been at the center of many controversial calls, as NASCAR ultimately holds the discretion to penalize a driver based on the circumstances.

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#6 Green–white–checker finish

NASCAR standardized the Green–white–checker finish in 2004 to prevent races from ending under caution. According to the rule, if a caution is thrown in the final laps, the field is restacked, and the race continues for two additional laps.

This rule has often proven the adage - "cautions breed cautions," yet it contributes to thrilling finishes. Fans remain divided on the rule, with many advocating for a green flag finish.

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#5 Restrictor plate

NASCAR introduced restrictor plates in 1988 at Superspeedway races to reduce engine power and prevent high-speed wrecks. These changes were made in the interest of driver and fan safety, aiming to prevent cars from overturning due to aerodynamic forces.

The restrictor plates gave rise to a new form of racing, where the pack is bunched up together. This also increased the chances of the "Big One," a massive wreck involving many cars in a single incident.

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#4 Playoff waiver

Playoff waivers have become one of the most debated topics in recent times, as the rule requires drivers to compete in all championship events to be eligible for the postseason. The governing body typically grants waivers in cases of injuries and suspensions, but the ruling was recently put to the test.

Kyle Larson's failed Indy-Charlotte double attempt left NASCAR in uncharted waters. The decision was delayed, but ultimately the #5 Hendrick Motorsports driver was declared eligible for the playoffs.

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#3 Stage racing

NASCAR introduced stage racing in 2017, breaking down a race into three stages and waving a stage caution on designated laps. These rules were accompanied by playoff points for stage winners and points for the top 10 finishers in the stages.

NASCAR experimented with eliminating stage cautions in road course races, but soon reverted to stage cautions.

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#2 Elimination playoff format

The elimination playoff format was introduced in 2014, expanding the playoff grid to 16 drivers. In the 10-race long postseason, playoff drivers are gradually eliminated in three different rounds, culminating in the season finale where the best finisher among the final four drivers is crowned the champion.

Although the rule ensures that the title will be decided in the season finale, it has raised questions about the legitimacy of the championship.

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#1 Chase for the Cup

Matt Kenseth's championship run in 2003 ultimately led to the introduction of the playoff format, then dubbed the "Chase for the Nextel Cup." Kenseth secured the title with just one win but demonstrated remarkable consistency throughout the season.

Chase For The Nextel Cup 2004 (Image via Getty)

The pivotal rule change has been the most influential in NASCAR, undergoing various iterations to reach its current form. Since the introduction of the playoff format, there has been a noticeable decline in the sport's popularity and TV ratings.