Answer
Kevin Harvick surpassed Joe Nemechek in national series starts in 2021. Harvick, a veteran driver with over 700 Cup Series starts, added to his impressive record in 2021, while Nemechek, who retired in 2015, remained at 645 national series starts. Harvick's continued participation in top-level NASCAR racing allowed him to surpass Nemechek's mark, cementing his status as one of the most experienced drivers in the sport.