Mark Bartelstein is a highly respected NBA certified contract advisor and the founder and CEO of Priority Sports & Entertainment, one of the most influential basketball representation firms in the world. After graduating from Northwestern University and earning his law degree from the University of Wisconsin, Bartelstein began his career as an agent and quickly built a reputation for strategic negotiation and deep industry insight. Today, he leads Priority Sports’ basketball division, which has been ranked the No. 1 NBA agency by total contract value in multiple years. Bartelstein represents an elite roster of NBA talent, including Jalen Brunson, Bam Adebayo, Karl-Anthony Towns, Jrue Holiday, Spencer Dinwiddie, Deandre Ayton, Collin Sexton, RJ Barrett and others, helping secure high-value contracts, extensions, and strategic career opportunities. Known for his meticulous preparation and client-first advocacy, he blends legal acumen with basketball business savvy to guide players through contract strategy, endorsement opportunities, and long-term professional growth.