Wood made his NASCAR debut in the 2001 Craftsman Truck Series at Martinsville Speedway, driving the #15 Ford F-150 for Billy Ballew Motorsports.

The release of Chuck Hossfeld allowed Wood to drive Roush Racing's #50 Eldon Ford for the rest of the year.

In 2002, Jon ran the entire schedule, earning ten top-10s with sponsorship from the United States Navy.

That year, he made his Busch Series debut at IRP, subbing for Jeff Burton in the #9 Gain Ford Taurus.

Wood was to continue to drive full-time in the #47 Clorox-sponsored Ford Fusion in the Busch Series but was pulled from the ride following medical issues.

He spent the rest of the season back in the Truck Series in the #21 Ford and had six top-tens in eleven starts as well as a pole position.