From ESPN:
With the Tuck Rule -- one that said any ball that left a quarterback's hand was a forward pass -- no longer in effect, once the ball starts coming back toward the quarterback's body, the passing motion is over, and it's therefore not a forward pass. Instead, it's a fumble.
"I was told that even though the ball was going forward, my arm was going backwards," Roethlisberger said. "I had to ask Josh Dobbs, who's an aerospace engineer, how that works. He said it's not possible. I can't get fined for that because I'm just telling you what Dobbs said."
With the Tuck Rule -- one that said any ball that left a quarterback's hand was a forward pass -- no longer in effect, once the ball starts coming back toward the quarterback's body, the passing motion is over, and it's therefore not a forward pass. Instead, it's a fumble.
"I was told that even though the ball was going forward, my arm was going backwards," Roethlisberger said. "I had to ask Josh Dobbs, who's an aerospace engineer, how that works. He said it's not possible. I can't get fined for that because I'm just telling you what Dobbs said."