In the post-race interview after the 4x400 final, Rai Benjamin said he had a late night out last night and wasn't even aware he was running the 4x400 until the morning of the final.
Was the team not made aware a protest was ongoing for the US team to be reinstated? Was Rai told he wasn't in the final lineup, and then they changed the lineup after the guys from the heats had to run twice? Or did Rai just drop the ball and not take his role seriously?
They only lost by hundredths so this might have been the decision-maker.