John Hollinger is a well-known sports analyst and writer, primarily recognized for his work in basketball. He gained prominence for developing the Player Efficiency Rating (PER), a statistic that measures a player's overall contribution to their team. Hollinger has contributed to various sports media outlets, including ESPN, where he provided insights and analysis on the NBA. In addition to his writing, Hollinger has held positions within professional basketball organizations. He served as the Vice President of Basketball Operations for the Memphis Grizzlies, where he applied his analytical skills to team management and player evaluation. His work has significantly influenced how basketball statistics are understood and utilized.