MRM
Team Owner
My nod goes to the 24 team for leaving Byron out too long on the last green flag stop. Had the dominate car and managed to lose the race.
I would think that Brad Keselowski's crew gets an honorable mention. They probably at least had a top 5 car, possibly a winning car, and threw it away with a bad pit stop or loose lug nut.
Byron's team gets an honorable mention as stated in the original post by @MRM
But I think Larson clearly takes it hands down. They should have parked it with about 50 laps to go. The late caution was a terrible thing and unnecessary.