QUINCY CAPS HIS #NBNI CAREER WITH TITLE NO. 7️⃣ Olympic gold medalist @_quincy_wilson brought his @bullis_track_fam (MD) team home in 3:09.62, winning the Boys Championship 4x400m relay here in Boston. Wilson split 45.46 on anchor to cap off the greatest career in the history of these championships. #NBNationals | 🎥 @duncan_boone