Grand Slam Track - A New Era for Pro Track 🏃♂️ Grand Slam Track (GST) is the revolutionary new pro track league founded by legendary Olympian Michael Johnson! GST is set to redefine track & field beyond the Olympic cycle, bringing entertainment, athlete storytelling, and nonstop action to fans year-round. With Greenfly at the core of their digital content strategy, GST will power real-time content distribution across LCC, Talent & Athlete Activation, Broadcast Clip Distribution, and Sponsor Activation.