Marsh Racing is an American professional stock car racing team that currently competing in the NASCAR K&N Pro Series East. The team is owned by Ted Marsh, a longtime Chevrolet team sporting the No. 31 with backing from Whelen Engineering. His current Rolex Series drivers include Boris Said and Eric Curran; his former NASCAR drivers included veterans Steve Park and Richard Childress Racing development driver Peyton Sellers.

Marsh Racing began competing in the Busch Series in 1998 with Ted Christopher competing in three races for the team. Driving the No. 13 Whelen Engineering Chevrolet, Christopher posted a best finish of 10th at Nazareth. In 1999, the team attempted 12 races, again with Ted Christopher driving the car. The team would make five races and post a best finish of 8th at Nazareth.

For the 2000 season, Marsh Racing selected Steve Park as the team's driver and Whelen Engineering returned as the sponsor for a limited schedule with the newly renumbered No. 31 car. Park put the car in the field nine of the fourteen events the team attempted and gave the team a new top finish when he placed 6th at Richmond. He also gave the team three top ten starts and a best start of second at Richmond.

Park returned to the team in 2001 and made all seven on the team's attempts. He posted five top ten finishes including a fourth at Bristol. The team almost managed two top ten starts with a third place start at New Hampshire. In September 2001, while Steve Park was driving the car he suffered a moderate concussion and was unable to race. Andy Santerre took over the car for the final three races of the limited schedule for the season, however mechanical failures plagued each race.

For the 2002 season David Green, Tim Fedewa, and Dave Blaney drove the car at different points throughout the season. The team posted a best finish of 14th at Bristol with Fedewa driving. The team suffered through four mechanical failures and three crashes throughout the season. Blaney returned to the car for the 2003 season after working with the team late in the 2002 season.

The team also switched to Ford from Chevrolet partway the 2003 season, with Blaney bringing support from Jasper Motorsports, the team he was driving for in Winston Cup at the time. Competing in ten events he managed six top 15 finishes with a best finish of 9th at Richmond. His best start during the season was a 4th at Chicagoland.

In 2004, the team again started the year with Dave Blaney driving the No. 31 Whelen Engineering Ford; however, after three races he was replaced with Todd Bodine. Bodine would give the car its best finish of the season when he finished 5th at Homestead–Miami, however the team only managed three top 20 finishes out of the eight races Marsh Racing competed in.

Dave Blaney returned the No. 31 team in 2005 and brought support from Richard Childress Racing as they switched back to Chevrolet. The team's best finish of the season came at Dover when Blaney finished 12th and the best start of the season came at Richmond where the team started 7th.