Apparently the Super Bowl 50 grounds crew thought the Denver Broncos were the only ones showing up to the game next Sunday. It appeared that on Thursday of last week, the grounds crew had accidentally painted the Broncos logo on both sides of the field, instead of just one. Some fine folks on Twitter pointed out that both sides of the end zones had a Broncos logo on it.
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Looks like some members of the grounds crew either came to their senses or saw Twitter, because eventually they recognized their slip up and began painting the Panthers end zone.
I'm sure the Panthers could see this as another example of no one believing them all season, even after they've made it to Super Bowl 50.