IMSA 2026 WeatherTech Championship Season Preview | With Leigh Diffey, Brian Till, and Calvin Fish

Ahead of the 2026 IMSA WeatherTech SportsCar Championship season on NBC Sports, Leigh Diffey, Brian Till, and Calvin Fish look back at a thrilling 2025 campaign before breaking down who can stop Mercedes-AMG’s push for a third straight IMSA title, which teams are poised for a reset, key driver and team changes, and more. #nbcsports #MotorsportsOnNBC #IMSA #autoracing #motorsport #sportscars FOLLOW IMSA: International Motor Sports Association YouTube: @imsaofficial Facebook: @IMSA Instagram: @imsa_racing TikTok: @imsa_racing X/Twitter: @IMSA Download the Official IMSA App for real-time results, timing & scoring. IMSA.com - Sports car racing and radio coverage, schedules, results and stories.