Yes he was. When Matt won the championship in 2003, it was called the Winston Cup. In 2004, it was renamed the Nextel Cup Series.
2003 was the last year that Winston sponsored NASCAR with Matt Kenseth winning the last Winston Cup.
In 2003, Bobby Labonte was the last Winston Cup race winner and Matt Kenseth won the Winston Cup championship.
Matt Kenseth won the Nascar Cup Series championship one time. It was in 2003. That was the last season under the Winston Cup name.
In 2003, Matt Kenseth won the last Winston Cup Series championship. The following season it was renamed the Nextel Cup Series.
In 2003, Matt Kenseth won the last Winston Cup Series championship. The following season it was renamed the Nextel Cup Series.
Matt Kenseth is famous among auto racing fans, due in part for being a top tier Nascar driver. In 2003, he became the last driver to win the Winston Cup Series championship. He also won the 2009 Daytona 500.
NASCAR has never had a Piston Cup in any of their series. They did have a Winston Cup and the last winner was Matt Kenseth.
Matt Kenseth (#17) won the championship in 2003 with 5022 points, followed by Jimmie Johnson; Dale Earnhardt, Jr.; Jeff Gordon; and Kevin Harvick.
In 2003, Matt Kenseth won the last Nascar Winston Cup Series championship. The following season the series was known as the Nextel Cup. The name was again changed in 2008 to the Sprint Cup.
The most recent NASCAR Sprint Cup (formerly Nextel Cup and Winston Cup) series champion was Tony Stewart, who tied Carl Edwards in the 2011 Chase For the Sprint Cup, and was awarded the championship based on number of wins compared to Carl Edwards. After the 2003 Winston Cup season the name was changed to Nextel Cup. The winner of the last Championship under the title Winston Cup was Matt Kenseth in the 2003 series.
Jimmie Johnson won the championship every season since it was named the "Sprint Cup Series", he was also a multiple race winner during each of those seasons. In 2003, Matt Kenseth won the last Winston Cup championship, while winning only one race during the year.
The race lasted 2 hours 51 minutes and 40 seconds. It was shortened to 152 laps of 200 due to rain and was won by Matt Kenseth.