Raiders' Antonio Brown has mysterious non-football injury at start of camp

Antonio Brown takes jab at Bills with 'Hotline Bling' meme

There are already questions surrounding Antonio Brown’s health and it’s only Day 1.

After Brown showed up to training camp Friday in a hot air balloon, he was placed on the non-football injury list, the team announced.

The injury is believed to be “very minor,” an ESPN report noted.

Brown was traded to the Raiders this offseason after spending his entire career with the Steelers. He then signed a three-year, $50.125 million contract with Oakland.

Coach Jon Gruden spoke … highly of Brown as the team geared up for camp.

“I expect a lot more drama from No. 84, I really do,” Gruden said, via the San Francisco Chronicle. “He’s a fun guy to be around. I expected a little bit more than a hot air balloon. I thought he might jump out of an airplane and parachute here himself. But he’s going to add a lot of life to this organization at a position where obviously we need some explosive plays.”

Although the Raiders announced Brown would be moved to the NFI list, they did not give any details regarding his injury.