Gary Weisbaum brings a strong sales and marketing background to the Team Rensi Motorsports ownership group. Weisbaum, a graduate of Northern Illinois University began his professional career in broadcasting, working on the production crew for ABC Sports, ABC News, and CBS. In 1982, he began working in the promotional marketing field, working on airline and defense industry accounts. In 1985 he formed Performance Promotions Group, a suburban Chicago based business-to-business marketing agency focused on companies with large dealer or distributor networks and/or large independent sales forces. In 1992 Gary began his motorsports activities as the sponsor representative for International Truck and Engine for Petty Enterprises. In 1999 Gary joined Ed Rensi as an owner/partner in Team Rensi Motorsports.

Weisbaum and his wife, Sheri reside in Long Grove, IL. Gary and Sheri are the proud parents of two sons, Michael and Brian.