He began his racing career in dirt-track modifieds and late models. In 1997, Reutimann moved into the NASCAR regional series before moving to the Busch Series in 2002. He moved up to the Sprint Cup Series in 2007, driving for Michael Waltrip Racing. Between the 2007 and 2011 Sprint Cup seasons, Reutimann recorded two wins, 26 top-tens, and four pole positions.

Reutimann lives in Mooresville, North Carolina, with his wife Lisa and daughter Emilia. They are members of Berea Baptist Church in Mooresville.

Before he was a full-time race car driver, Reutimann worked briefly for the United Parcel Service, which in 2008 became his primary sponsor for the rest of that season.

Reutimann, a third-generation racer, began his racing career in dirt-track modifieds and late models before moving up to the Slim Jim All Pro Series in 1997. He was named Rookie of the Year, finishing in the top-ten eight times and had a fifth-place points finish. The next season, he dropped to seventh in points, but received the Sportsmanship award at season's end. After several years, Reutimann got his first three wins in 2002 and finished second in the overall championship standings.

That same year, Reutimann made his Busch Series debut at Richmond International Raceway. Driving the No. 87 Geico Chevrolet Monte Carlo for NEMCO Motorsports, Reutimann started thirty-fourth but finished sixteenth. He led twelve laps at his next race at Memphis Motorsports Park, and finished in the top-fifteen in each of his next two races. In 2003, Reutimann won a contest names "Hills Bros. Coffee Break of a Lifetime", a contest where Hills Bros. Coffee selected one driver to receive full sponsorship from them for 5 Busch Series races, and if that driver were to score 3 top 10's in those races, they'd receive a chance to start a Cup race. He ran those 5 races, along with 2 extra races, for NEMCO Motorsports. He finished fifth at Nashville Speedway USA and The Milwaukee Mile, as well as qualifying Greg Biffle's car on the pole at Memphis. He also attempted the New England 300 and the Brickyard 400 in the Winston Cup Series in the No. 04 for Morgan-McClure Motorsports, but failed to qualify both times.

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