Coach Dathan Ritzenhein Raves About Potential of His OAC Team Alicia Monson “could be someone like Shalane and Deena” and Olli Hoare has a skillset “unique to five or ten other people in the world .” May 7, 2021 Dathan Ritzenhein. It doesn’t sound quite as familiar as athlete Dathan Ritzenhein, but it soon may. Ritz is the head coach of the newly formed On Athletics Club (OAC), which has four NCAA D1 champions on its roster ( Leah Falland (O’Connor), Olli Hoare, and Geordie Beamish), and is starting to turn a few heads as the OAC athletes are running well in the club’s first year of existence.