When Deontay Wilder finally took off the gold mask he wore into the ring, he displayed a fierce scowl.
That look never disappeared from his face as he knocked out the only man who'd ever gone the distance with him.
Wilder sent Bermane Stiverne to the canvas three times in the opening round to defend his WBC heavyweight title Saturday night at Barclays Center.
"So much frustration, it just seemed like my career, it's been crazy . so many guys using PEDs," Wilder said. "I just want to prove that I am the best. I know I am the best, but I wanna prove I am the best."
There wasn't much question of that in the Showtime card that ended in...