Mark Green began his racing career in 1973, racing go-karts in the Southern Indiana Racing Association. During his tenure, he won six consecutive championships. He then moved on to the late model division at several local speedways. Among the tracks he competed on were Nashville Speedway USA, Beech Bend Raceway and Kentucky Motor Speedway. From 1988 to 1991, he also competed in the All-American Challenge Series. In 1993, he won 16 of 20 races at Beech Bend and won the track championships there, from 1991 to 1993.

Green made his Busch debut in 1995 at Indianapolis Raceway Park. He qualified the #41 Brewco Motorsports Chevrolet in twenty-eighth spot, and finished eighteenth. He signed to run ten more races in 1996, in the #37 Timber Wolf Chevy. He posted his first career top-ten at Myrtle Beach Speedway, where he finished tenth, in addition to qualifying on the outside pole. In 1997, Green and Brewco ran the full schedule, posting five top-tens including a career-best fifth-place finish at Charlotte Motor Speedway. He finished 11th in points. Green also ran two Craftsman Truck Series races that year for Brewco, finishing eleventh at IRP.

In 1998, Green continued to drive for Brewco, but only had four top-ten finishes. After his thirteenth-place points finish, Green departed from the team. He joined Washington-Erving Motorsports, driving the #50 Dr Pepper Chevy. His best finish that season was tenth at the Yellow Freight 300 and he dropped to 21st in the standings. He exited the ride due to a lack of funding and drove the #63 Exxon Chevy for HVP Motorsports and had a seventh-place run at Talladega Superspeedway.

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