Gregory B. Genske is a lawyer and Major League Baseball Players Association certified player representative. In July 2020, Genske merged his GEM Agency with Gary Vaynerchuk's VaynerSports to create VaynerBaseball. Genske serves as VaynerBaseball's CEO and oversees all of VaynerSports' baseball player representation activities. In October 2019, Genske launched the GEM Agency in partnership with Hicks Equity Partners, the private equity arm of Tom Hicks and his family. Prior to launching GEM, Genske was executive director and President of Baseball for The Legacy Agency. Since 2015, Genske has served as a law professor at the University of California-Berkeley, his alma-mater, teaching classes on sports law, representing professional athletes and negotiations. In 2009, Genske was named to Sports Business Daily's prestigious 40 under 40 list.[1]