NBC Sports Now is streaming a 2024 Supercross Marathon Sunday, March 16, 2025 starting at 1 PM Eastern. Catch 4 rounds won by 450 Supercross Champion Jett Lawrence.⁣ ⁣ 🔗Check out our All the Info link in bio for details.⁣ ⁣ #SMX #SupercrossLIVE #SupercrossMarathon #NBCSportsNow