World Racing Group sanctions local and regional dirt track racing events in the United States and Canada under the DIRTcar Racing brand. The company also owns and operates Volusia Speedway Park in Barberville, FL. WRG presents several national touring series, including the World of Outlaws Sprint Car Series, World of Outlaws Late Model Series, Super DIRTcar Series, Xtreme Outlaws Midget Series, DIRTcar Summer Nationals Tour, and American Sprint Car Series.
Paul Kruger, a businessman from Norman, Oklahoma, purchased the World of Outlaws touring series in 2001. The company went public in October 2003 as Boundless Motorsports Inc. Kruger then acquired Dirt Motorsports, a New York state-based sanctioning and promotional company. Dirt Motorsports operated touring series and owned or controlled management of Canandaigua Speedway, Orange County Fair Speedway in Middletown, NY, Rolling Wheels Raceway in Elbridge, NY, and Weedsport Speedway. Its assets included the video production company DIRT-TV. Boundless Motorsports Inc. introduced a national touring series for Late Models, acquired the United Midwestern Promoters/Xtreme Dirt Car Series (UMP), and the Mid America Racing Series (MARS). It also purchased Lernerville Speedway in Sarver, PA and Volusia Speedway Park.
In 2007, the company was restructured to operate as the World Racing Group, and a new management team replaced Kruger. As part of this change, UMP was rebranded as DIRTcar and referred to as DIRTcar Midwest division, while the New York-based operations became DIRTcar Northeast. By 2009, WRG had divested from ownership of MARS, though it continued to sanction the series with DIRTcar. Between 2013 and 2015, WRG sold off its racetracks, retaining only the Barberville, Florida facility. In 2021, WRG unveiled the Xtreme Outlaw Midget Series and Xtreme Outlaw Sprint Car Series. In 2024, WRG added the American Sprint Car Series to its portfolio; this national series for 360 sprint cars was founded by Emmett Hahn in 1992.
The foundation for DIRT Motorsports began in 1970 when Glenn Donnelly bought the Weedsport Speedway. Donnelly collaborated with other speedway promoters to form Drivers Independent Race Tracks (DIRT) to bring rules uniformity and increased sponsorship to modified stock car racing at Upstate New York dirt tracks.
Donnelly sold the organization to Boundless Motorsports in 2003. Within two years, Boundless adopted DIRT Motorsports, Inc. as its corporate name and began doing business as World Racing Group. The former Donnelly organization then became known as DIRT Northeast, and later DIRTcar Northeast.
United Midwestern Promoters was a short track motor racing sanctioning body created in 1984 by Bob Memmer. Memmer established standardized technical specifications for Late Model racing. In late 2002, Ken Schrader, Bob Sargent, Robert Lawton, and Howard Commander purchased the organization. In late 2004, UMP merged with Doug Bland's Xtreme Dirt Car Series and was acquired by WRG. In 2007, WRG rebranded UMP as DIRTcar, referring to it as DIRTcar Midwest division to distinguish it from WRG's New York operations.
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