Mark Gastineau, the former holder of the NFL single-season sack record, accuses Brett Favre of intentionally taking a dive to allow Michael Strahan to break his record in 2001. See never before seen footage from the upcoming ESPN 30 for 30 documentary featuring a tense encounter between Gastineau and Favre as the former defensive star confronts the Hall of Fame quarterback. Was Strahan's record-breaking sack legitimate? Watch to find out! 🏈